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1. 40 43 Wiring Diagrams for Electronic Control Board 44 55 Wiring Diagrams for Wall Mounted Thermostats 56 58 Thermistors Resistance Values 59 60 61 IMPORTANT SAFETY INFORMATION The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required for installation and repair and who is equipped with the proper tools and test instruments required to service this product Installation or repairs made by unqualified persons can result in subjecting the unqualified person making such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical shock which can be serious or even fatal Safety warnings have been placed throughout this manual to alert you to potential hazards that may be encountered If you install or perform service on equipment it is your responsibility to read and obey these warnings to guard against any bodily injury or property damage which may result to you or others Your safety and the safety of others are very important We have provided many important safety messages in this manual and on your appliance Always read and obey all safety messages This is a safety Alert symbol This symbol alerts you to potential hazards that can kill or hurt you and others
2. 24 Refrigerant 24 Method Of Charging 25 Undercharged Refrigerant Systems 26 Overcharged Refrigerant Systems 26 Restricted Refrigerant Systems 27 Capillary Tube Systems Check Valve 28 Reversing Valve Description Operation 29 Testing CO 30 Checking Reversing Valves 30 Reversing Valve Touch Testing Heating Cooling Cycle 31 Procedure For Changing Reversing Valve 31 Compressor CheckSs nir erect 32 Locked Rotor Voltage Test 32 Single Phase Connections 32 Determine Locked Rotor Voltage 32 Locked Rotor Amperage Test 32 Single Phase Running amp Locked Rotor Amperage 32 External Overload es 32 Checking the External Overload 32 Compressor Single Phase Resistance Test 33 Compressor Replacement 34 35 Routine Maintenance 36 37 Troubleshooting Charts 38 39 Wiring Diagram Index
3. 210 357 4400 www friedrich com PD SERIES PACKAGED TERMINAL AIR CONDITIONERS LIMITED WARRANTY SAVE THIS CERTIFICATE It gives you specific rights you may also have other rights which may vary from state to state and province to province In the event that your unit needs servicing contact your nearest authorized service center If you do not know the nearest service center ask the company that installed your unit or contact us see address and telephone number above When requesting service please have the model and serial number from your unit readily available Unless specified otherwise herein the following applies PACKAGED TERMINAL AIR CONDITIONERS AND HEAT PUMPS LIMITED WARRANTY FIRST YEAR Eighteen 18 Months from the original date of purchase or twelve 12 months from installation Any defect in the unit s material or workmanship will be repaired or replaced free of charge by our authorized service center during the normal working hours and LIMITED WARRANTY SECOND THROUGH FIFTH YEAR Sixty six 66 months from the date of purchase ON THE SEALED REFRIGERATION SYSTEM Any part of the sealed refrigeration system on the P series that is defective in material or workmanship will be repaired or replaced free of charge excluding freight charges by our authorized service center during normal working hours The sealed refrigeration system consists of the compressor metering device evaporator condenser reversing valve
4. D 2 N o o N N PHYSICAL DATA Dimensions 16 X 42 X13 5 16 X 42 13 5 Net Weight 105 105 Shipping Weight 123 123 R 22 Charge 2169 27 5 16 X 42 13 5 112 130 8 53 s 54 wo o en o 20 5 16 x 42 x13 5 5 125 125 _ w 65 3 32 5 4 50 80 70 39 0 9 250 Receptacles and Fuse Types gt an PERFORMANCE ed AMPS CERTIFIED CERTIFIED ARI Standard 310 380 ARI Standard 310 380 5 IZE 0 2 5kW Packaged Terminal AC Packaged Terminal HP RECEPTACLE fe COOLING amp HEATING PERFORMANCE FOR 2009 MODELS PDE Extended Cooling Performance OUTDOOR DRY BULB TEMP DEGREES F AT 409 R H BTUh INDOOR WET BULB TEMP DEGREES F AT 80 D B 725 725 WATTS AMPS 5 5 5 sar ost or os 052 072 os 053 Extended Cooling Performance OUTDOOR DRY BULB TEMP DEGREES F AT 409 R H RATING POINT ARI 310 380 0 7102 6274 960 960 0 81 11580 1862 77 0 84 7 INDOOR WET BULB TEMP DEGREES F AT 80 D B 5 7 3 0 86 9 4910 02 oee osr oss CS efe 0 5 Extended Cooling PDHO7 PDHO9 arm Cal ues Cam Cal Ca
5. ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death BLOWER FAN MOTOR TEST 1 Do a visual inspection of motor s wiring housing etc Determine that the capacitor is serviceable 2 Make sure the motor has cooled down 3 Disconnect the fan motor wires from the control board 4 Test for continuity between the windings also test to ground 9 If any winding is open or grounded replace the motor 6 A live test can also be performed by using a live test probe see appropriate wiring schematic Fan Motor CAPACITORS ELECTRIC SHOCK HAZARD Turn off electric power before servicing Discharge capacitor with a 20 000 Ohm 2 Watt resistor before handling Failure to do so may result in personal injury or death Many motor capacitors are internally fused Shorting the terminals will blow the fuse ruining the capacitor A 20 000 ohm 2 watt resistor can be used to discharge capacitors safely Remove wires from capacitor and place resistor across terminals When checking a dual capacitor with a capacitor analyzer or ohmmeter both sides must be tested Capacitor Check with Capacitor Analyzer The capacitor analyzer will show whether the capacitor is open or shorted It will tell whether the capacitor is within its micro farads rating and it will show whether the capacitor is operating at the proper power factor
6. RISK OF ELECTRIC SHOCK Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death 1 certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death 2 Recover all refrigerant from the system though the process tubes PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED Do not use gauge manifold for this purpose if there has been a burnout You will contaminate your manifold and hoses Use a Schrader valve adapter and copper tubing for burnout failures AWARNING HIGH TEMPERATURES Extreme care proper judgment and all safety procedures must be followed when testing troubleshooting handling or working around unit while in operation with high temperature components Wear protective safety aids such as gloves clothing etc Failure to do so could result in serious burn injury NOTICE FIRE HAZARD The use of a torch requires extreme care and proper judgme
7. System E Cooling with or without electric heat Options H Heat Pump with S Standard Auxiliary Heat Nominal Cooling Capacity Nominal Heater Size 07 7000 BTUh 230V or 265V 09 9000 BTUh 0 No Heater 12 12000 BTUh 2 2 5KW 15 15000 BTUh 3 3 4KW 5 5 0KW Voltage 208 230V 1Ph 60Hz R 265V 1Ph 60Hz PTAC Serial Number Identification Guide Serial Number 00000 Decade Manufactured Production Run Number L 0 C 3 F 6 A 1 D 4 PRODUCT LINE Year Manufacture A 1 P PTAC Bue M PTAC C 3 Month Manufactured A Jan D Apr G Jul K Oct B Feb E May H Aug L Nov C Mar F Jun J Sep M Dec Electric Heat Data Model Identification Components Dimensions For 2009 and 2008 Models Electric Heat Data 07 09K R PDE PDHO7K PDE PDHO7R PDE09KO PDE PDHO9K PDE PDHO9R VOLTAGE 230 208 265 230 208 230 208 HEATING BTUh 8500 7000 11600 9500 8500 1160 0 8500 7000 11600 9500 8500 11600 HEATING CURRENT AMPS 11 4104 15 3 13 9 12 so uc BRANCH CIRCUIT FUSE AMPS 20 Electric Heat Data PDE PDH 07 09K R ___________ 0 PDEIPDH R PDEIPDHISK_ PDEIPDHISR HEAD Tn o Lee 1 sso meoo o 1600600 rooorae00 HEATING CURRENT AMPS 114104 153 139 223 203 15 3 13 9 22 3 20 3 MINIMUM CIRCUIT AMPACITY 5 Typical Unit Components
8. 45 47 Lam 53 8 LS RATING POINT ARI 310 380 ELECTRICAL RATING TABLES WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation All electrical connections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction Failure to do so could result in serious personal injury or death NOTICE FIRE HAZARD Not following the above WARNING could result in fire or electrically unsafe conditions which could cause moderate or serious property damage Read understand and follow the above warning NOTE Use Copper Conductors ONLY Wire sizes are per NEC check local codes for overseas applications Table 1 250 V Receptacles and Fuse Types Use ONLY wiring size recommended for Use ONLY type and size fuse or HACR RECEPTACLE Gei a circuit breaker indicated on unit s rating FUSE CIRCUIT plate Proper current protection to the unit TIME DELAY TYPE FUSE BREAKER is the responsibility of the owner NOTE A time delay fuse is provided with 265V or HACR circuit breaker units 227472 eum Unit MUST be grounded from branch NOTE 265 volt units are hard wired circuit through service cord to unit or through separate ground wire provided on permanently connected units Be sure that branch circuit or general purpose outlet is grounded The field supplied outlet must match plug on service
9. TECHNICAL SUPPORT CONTACT INFORMATION rriedrich FRIEDRICH AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com Printed in the U S A Table of Contents Important Safety Information 2 4 EE 4 Typical Unit Components 4 Unit e 5 Unit SPCCHICATONS 2009 Models Chassis Specifications Performance 7 8 2008 Models Chassis Specifications Performance 9 10 Electrical Rating Tables 11 Power ccce t 12 Remote Wall Thermostat Low Voltage Wire 13 Digital Control Features 14 15 Digital Control Operation 16 Digital Control User Input Configuration 17 Optional Hand Held Remote Control Operation 18 Digital Control Diagnostics amp Test Mode 18 20 Components Testing a 21 22 Refrigeration System Sequence of Operation 23 Sealed Refrigeration System Repairs
10. WIRING DIAGRAM PART 260 683 00 FOR 230V P FOR 265V P ad ad o LL 2 lt ad 07313 XO 4 4409 COOL W ELE HEAT WIRES RELAY 5 RV1 J10 WIRING DIAGRAM mmm PCB TRACE E CONTROL 91313 4 5 47 48 WIRING DIAGRAM PART 260 683 10 OR FIELD WIRING OR FIELD WIRING POWER CORD POWER CORD LF J9 RELAY 5 2 d gt IN N 2 WIRING DIAGRAM COOL W ELE HEAT WIRES mmm PCB TRACE E CONTROL WIRING DIAGRAM PART 260 683 20 071313 MO 4 L 11513 818 TRANSFORMER DEICE 230V J12 265V J11 5 2 s a gt 5 FOR 265V PLACE ON 11 WIRING DIAGRAM COOL W ELE HEAT 071313 YO 4 9305 N3MOd 49 WIRING DIAGRAM PART 260 684 00 z z o X 77 lt 5 o lt gt a gt o be N a u FOR 265V PLACE ON 11 HEAT PUMP W ELE HEAT WIRING DIAGRAM mms PCB TRACE E CONTROL 50 WIRING DIAGRAM PART 260 684 10 POWER CORD OR FIELD WIRING POWER CORD OR FIELD WIRING L 3 Ly a 5 1 WIRING DIAGRAM HEAT PUMP W ELE HEAT WIRES TRACE E CONTROL 51 52 WIRING DIAGRAM PART 260 684
11. 8400 7920 7305 8070 7500 6638 7560 6713 5918 6728 5790 515 PDEOT CERTEN EN NENNEN PDE09 AMPS PDEI2 WATTS 1007 1019 1121 1121 1121 1212 warts 1288 1309 1323 1418 1435 1579 1579 1579 1707 1705 1710 1862 86 1870 AMPS 54 88 59 66 1 BTUh 17640 16965 15705 16800 15840 11610 16140 715000 13275 15120 13425 11835 13455 11580 10230 PDE15 sm 07 094 05 072 096 053 045 os 05 079 097 057 ose 0 PDH Ex OUTDOOR DRY BULB TEMP DEGREES F AT 40 R H 85 95 110 INDOOR WET BULB TEMP DEGREES F AT 80 F D B _72 62 72 67 62 72 er 62 72 67 62 72 67 62 7 PDH09 PDH12 PDH15 Extende tended Cooling Performance WATTS 486 493 499 534 541 55 595 595 6 22 Ams 25 25 25 27 27 27 30 32 32 32 35 35 35 pos por pos ou 9 s 55 E CG 1 1618 1618 De 147 RATING POINT ARI 310 380 d Heating Performance OUTDOOR DRY BULB TEMP DEGREES F p 3 4 53 53 7 PDH09 PDH12 PDH15 DER 55 58 57 60 ___ 25 ___ _26 ____26 71 EE 38
12. All safety messages will follow the safety alert symbol with the word WARNING or CAUTION These words mean A WARN NG You can be killed or seriously injured if you do not follow instructions A CAUTION You can receive minor or moderate injury if you do not follow instructions All safety messages will tell you what the potential hazard is tell you how to reduce the chance of injury and tell you what will happen if the instructions are not followed A message to alert you of potential property damage will have the NO TICE word NOTICE Potential property damage can occur if instructions are not followed PERSONAL INJURY OR DEATH HAZARDS ELECTRICAL HAZARDS e Unplug and or disconnect all electrical power to the unit before performing inspections maintenance or service e Make sure to follow proper lockout tag out procedures Always work in the company of a qualified assistant if possible e Capacitors even when disconnected from the electrical power source retain an electrical charge potential capable of causing electric shock or electrocution e Handle discharge and test capacitors according to safe established standards and approved procedures e Extreme care proper judgment and safety procedures must be exercised if it becomes necessary to test or troubleshoot equipment with the power on to the unit Do not spray or pour water on the return air grille discharge air grille evaporator coil contro
13. Dimensions Wall Sleeve Outdoor Louver Filters FO j 3 PDXWS Wall Sleeve Dimensions Return Air Grille EE Front Cover 2 Front Cover Dimensions 16 H x 42 7 gt D Cut Out Dimensions 164 x 42 CHASSIS SPECIFICATIONS FOR 2009 MODELS PDE Series Chassis Specifications PDEO7K PDEO7R PDEO9K PDEO9R PDE12K PDE12R PDE15K 15000 14800 7s PDE15R PERFORMANCE DATA Cooling BTUh 7500 7300 Power Watts 615 598 EER 12 2 7500 615 12 2 9200 9000 814 796 11 3 12200 12000 1140 1121 1077 12200 1140 10 7 Dehumidification Sensible Heat Ratio 0 76 ELECTRICAL DATA Voltage 1 Phase 60 Hz Volt Range 0 75 0 72 5 o e ER N 4 9 230 208 265 230 208 265 230 208 265 230 208 253 198 292 239 253 198 292 239 253 198 292 239 253 198 292 239 Current Amps Power Factor Amps L R Amps F L Horsepower a E AJN gt 9 N o AIRFLOW DATA Indoor CFM High Indoor CFM Low Vent CFM o o o o N o N N o N o N N w N ER D 5 a ES N D 5 a EX EN En Ze o a E PHYSICAL DATA 16 X 42 13 5 16 X 42 13 5 105 105 123 123
14. PDEO7K SB A 260 683 00 REV 3 41 PDEO7R SB A 260 683 00 REV 3 41 PDEO7K SB C 260 683 00 REV 3 41 PDEO7R SB C 260 683 00 REV 3 41 PDEO7K SB D 260 683 00 REV 3 41 PDEO7R SB D 260 683 00 REV 3 41 PDEO7K SC A 260 683 00 REV 3 41 PDEO7R SC A 260 683 00 REV 3 41 PDEO7K SC B 260 683 20 43 PDEO7R SC B 260 683 20 43 PDEO7K SD A 260 785 00 47 PDEO7R SD A 260 785 00 AT PDEO7K SD A 260 786 00 48 PDEO7R SD A 260 786 00 48 PDEO7K SD B 260 785 00 47 PDEO7R SD B 260 785 00 AT PDEO7K SD B 260 786 00 48 PDEO7R SD B 260 786 00 48 PDEO7K SD C 260 785 00 AT PDEO7R SD C 260 785 00 AT PDEO7K SD C 260 786 00 48 PDEO7R SD C 260 786 00 48 MODEL WIRING DIAGRAM PAGE MODEL WIRING DIAGRAM PAGE PDHO7K PDHO7R PDHO7K CB A 260 684 00 REV 3 44 PDHO7R CB A 260 684 00 REV 3 44 PDHO7K CB C 260 684 00 REV 3 44 PDHO7R CB C 260 684 00 REV 3 44 PDHO7K SB A 260 684 00 REV 3 44 PDHO7R SB A 260 684 00 REV 3 44 PDHO7K SB C 260 684 00 REV 3 44 PDHO7R SB C 260 684 00 REV 3 44 PDHO7K SB D 260 684 00 REV 3 44 PDHO7R SB D 260 684 00 REV 3 44 PDHO7K SC A 260 684 00 REV 3 44 PDHO7R SC A 260 684 00 REV 3 44 PDHO7K SC B 260 684 20 46 PDHO7R SC B 260 684 20 46 PDHO7K SD A 260 787 00 49 PDHO7R SD A 260 787 00 49 PDHO7K SD B 260 787 00 49 PDHO7R SD B 260 787 00 49 PDHO7K SD C 260 787 00 49 PDHO7R SD C 260 787 00 49 WIRING DIAGRAM INDEX 9K BTU Denotes KW of Electric Heater Okw 2kw 3kw or 5kw MODEL WIRING DIAGRAM PAGE MODEL WIRING DIAGRAM PAGE PDEO9K PDEO9R PDEO9K CB A 260 682 00 REV 3 38 PD
15. A 260 787 00 49 PDHO9K SD B 260 787 00 49 PDHO9R SD B 260 787 00 49 PDHO9K SD C 260 787 00 49 PDHO9R SD C 260 787 00 49 41 WIRING DIAGRAM INDEX 12K BTU MODEL PDE12K WIRING DIAGRAM PAGE MODEL PDE12R WIRING DIAGRAM PAGE 42 PDE12K CB A PDE12K CB A PDE12K CB C PDE12K CB D PDE12K SB A PDE12K SB A PDE12K SB C PDE12K SB D PDE12K SC A PDE12K SC B PDE12K SC B PDE12K SD A PDE12K SD A PDE12K SD B PDE12K SD B PDE12K SD C PDE12K SD C MODEL PDH12K PDH12K CB A PDH12K CB C PDH12K SB A PDH12K SB C PDH12K SB D PDH12K SC A PDH12K SC B PDH12K SD A PDH12K SD B PDH12K SD C 260 682 00 260 683 00 260 683 00 260 683 00 260 682 00 260 683 00 260 683 00 260 683 00 260 683 00 260 682 20 260 683 20 260 785 00 260 786 00 260 785 00 260 786 00 260 785 00 260 786 00 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 WIRING DIAGRAM 260 684 00 260 684 00 260 684 00 260 684 00 260 684 00 260 684 00 260 684 20 260 787 00 260 787 00 260 787 00 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 38 41 41 41 39 41 41 41 41 40 43 47 48 47 48 47 48 PAGE 44 44 44 44 44 44 46 49 49 49 Denotes KW of Electric Heater Okw 2kw 3kw or 5kw PDE12R CB A PDE12R CB A PDE12R CB C PDE12R CB D PDE12R SB A PDE12R SB A PDE12R SB C PDE12R SB D PDE12R SC A PDE12R SC B PDE12R SD A PDE12R SD A PDE12R SD B PDE12R SD B PDE12R SD C PDE12R SD C MODEL PDH12R PDH12R CB A
16. Dimensions Net Weight Shipping Weight R 22 Charge 16 X 42 X13 5 112 130 5 ui Q E PDH Series Chassis Specifications PDHO7K PDHO7R PDHO9K PDHO9R PDH12K PDH12R PDH15K PDH15R 14700 14500 14700 1581 1559 1581 5 9 13300 13100 13300 PERFORMANCE DATA Cooling BTUh 7200 7000 Power Watts Cool 595 579 EER 121 Heat Pump BTUh 6400 6200 Power Watts Heat 568 550 COP 9100 8900 805 788 11 3 8100 7900 791 772 12000 11800 1165 1146 10 3 10400 10600 1035 1016 12000 1165 10 3 10600 1035 a 3 1344 1324 1344 230 208 265 230 208 265 253 198 292 239 253 198 292 239 2 5 3 N Dehumidification o Sensible Heat Ratio 0 76 ELECTRICAL DATA Voltage 1 Phase 60 Hz Volt Range 0 75 072 olo olo a NO Oe ole 230 208 253 198 230 208 292 239 253 198 292 239 Current Amps Heat Pump Amps 5 Power Factor Amps L R Amps F L Horsepower to o o o AJN GEN 9 NN B N a w o N w N A Alo Oj AIRFLOW DATA Indoor CFM High Indoor CFM Low Vent CFM N olo o a 3 35 28 7 N N 3 o x N ei v a a ER o x EN a o x A 2 D EN o E a o x D
17. Flow Across Restriction Fully Seated Fully Seated Indoor Coil Undercharged Overcharged Undercharged Overcharged Defective Compressor Defective Compressor EE air ELECTRICAL TROUBLESHOOTING CHART HEAT PUMP AWARNING AWARNING ELECTRIC SHOCK HAZARD BURN HAZARD Turn off electric power before service or Certain unit components operate at installation temperatures hot enough to cause burns Extreme care must be used if it becomes Proper safety procedures must be followed necessary to work on equipment with power and proper protective clothing must be applied worn Failure to do so could result in serious injury Failure to do so could result in serious or death injury or death HEAT PUMP SYSTEM COOLS WHEN HEATING IS DESIRED Is Line Voltage Present at the Solenoid Valve YES Is the Solenoid Coil Good Replace the Solenoid Coil NO YES Is the Selector Switch Set for Heat Reversing Valve Stuck Replace the Reversing Valve WIRING DIAGRAM INDEX 7K BTU 40 Denotes KW of Electric Heater Okw 2kw 3kw or 5kw MODEL WIRING DIAGRAM PAGE MODEL WIRING DIAGRAM PAGE PDE07K PDE07R PDEO7K CB A 260 682 00 REV 3 38 PDEO7R CB A 260 682 00 REV 3 38 PDEO7K CB A 260 683 00 REV 3 41 PDEO7R CB A 260 683 00 REV 3 41 PDEO7K CB C 260 683 00 REV 3 41 PDEO7R CB C 260 683 00 REV 3 41 PDEO7K CB D 260 683 00 REV 3 41 PDEO7R CB D 260 683 00 REV 3 41 PDEO7K SB A 260 682 00 REV 3 38 PDEO7R SB A 260 682 00 REV 3 38
18. HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death Testing of the heating elements can be made with an ohmmeter or continuity tester across the terminals after the power wires have been removed Test the limit switch for continuity across its input and output terminals Test below the limit switch s reset temperature DRAIN PAN VALVE During the cooling mode of operation condensate which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil This assists in cooling the refrigerant plus evaporating the water During the heating mode of operation it is necessary that water be removed to prevent it from freezing during cold outside temperatures This could cause the condenser fan blade to freeze in the accumulated water and prevent it from turning To provide a means of draining this water a bellows type drain valve is installed over a drain opening in the base pan This valve is temperature sensitive and will open when the outside temperature reaches 40 F The valve will close gradually as the temperature rises above 40 F to fully close at 60 F Bellows Assembly Drain Pan Valve REFRIGERATION SEQUENCE OF OPERATION A good understanding of the basic operation of the refrigeration system is essential for the service technician Without this understanding accurate troubleshooting of refrigeration s
19. PDH12R CB C PDH12R SB A PDH12R SB C PDH12R SB D PDH12R SC A PDH12R SC B PDH12R SD A PDH12R SD B PDH12R SD C 260 682 00 260 683 00 260 683 00 260 683 00 260 682 00 260 683 00 260 683 00 260 683 00 260 683 00 260 683 20 260 785 00 260 786 00 260 785 00 260 786 00 260 785 00 260 786 00 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 WIRING DIAGRAM 260 684 00 260 684 00 260 684 00 260 684 00 260 684 00 260 684 00 260 684 20 260 787 00 260 787 00 260 787 00 REV 3 REV 3 REV 3 REV 3 REV 3 REV 3 38 41 41 41 38 41 41 41 41 43 47 48 47 48 47 48 PAGE 44 44 44 44 44 44 46 49 49 49 WIRING DIAGRAM INDEX 15K BTU Denotes KW of Electric Heater Okw 2kw 3kw or 5kw MODEL WIRING DIAGRAM PAGE MODEL WIRING DIAGRAM PAGE PDH15K PDE15R PDE15K CB A 260 682 00 REV 3 38 PDE15R CB A 260 682 00 REV 3 38 PDE15K CB A 260 683 00 REV 3 41 PDE15R CB A 260 683 00 REV 3 41 PDE15K CB B 260 682 10 REV 3 39 PDE15R CB B 260 682 10 REV 3 39 PDE15K CB B 260 683 10 REV 3 42 PDE15R CB B 260 683 10 REV 3 42 PDE15K CB C 260 683 00 REV 3 41 PDE15R CB C 260 683 00 REV 3 41 PDE15K CB D 260 683 00 REV 3 41 PDE15R CB D 260 683 00 REV 3 41 PDE15K SB A 260 682 00 REV 3 38 PDE15R SB A 260 682 00 REV 3 38 PDE15K SB A 260 683 00 REV 3 41 PDE15R SB A 260 683 00 REV 3 41 PDE15K SB B 260 682 10 REV 3 39 PDE15R SB B 260 682 10 REV 3 39 PDE15K SB B 260 683 10 REV 3 42 PDE15R SB B 260 683 10 REV 3 42 PDE15K SB
20. air flow problems Improper air flow over the evaporator coil may indicate some of the same symptoms as an over charged Accumulator system Suction Pressure gt Indoor Coil oticeably High Pressure An overcharge can cause the compressor to fail since it Sd would be slugged with liquid refrigerant Refrigerant The charge for any system is critical When the compressor is noisy suspect an overcharge when you are sure that the air quantity over the evaporator coil is correct Icing Overcharged System Restricted Refrigerant System Troubleshooting a restricted refrigerant system can be difficult The following procedures are the more common problems and solutions to these problems There are two types of refrigerant restrictions Partial restrictions and complete restrictions A partial restriction allows some of the refrigerant to circulate through the system With a complete restriction there is no circulation of refrigerant in the system Restricted refrigerant systems display the same symptoms as a low charge condition When the unit is shut off the gauges may equalize very slowly Gauges connected to a completely restricted system will run in a deep vacuum When the unit is shut off the gauges will not equalize at all A quick check for either condition begins at the evaporator With a partial restriction there may be gurgling sounds Accumulator Suction Pressure indoor Deep Vacuum at
21. failed NOTE OHM Figures are for examples only not actual values for the compressor 3 16 OHMS 49 OHMS 3 65 OHMS RESISTANCE Stoc RESISTANCE Rtoc EQUALS RESISTANCE StoR Many compressor failures are caused by the following conditions 1 Improper air flow over the evaporator 2 Overcharged refrigerant system causing liquid to be returned to the compressor 3 Restricted refrigerant system 4 Lack of lubrication 5 Liquid refrigerant returning to compressor causing oil to be washed out of bearings 6 Noncondensables such as air and moisture the system Moisture is extremely destructive to a refrigerant system 7 Capacitor test see page 21 CHECKING COMPRESSOR EFFICIENCY The reason for compressor inefficiency is normally due to broken or damaged suction and or discharge valves reducing the ability of the compressor to pump refrigerant gas This condition can be checked as follows 1 Install a piercing valve on the suction and discharge or liquid process tube 2 Attach gauges to the high and low sides of the system 3 Start the system and run a cooling or heating perfor mance test If test shows A Below normal high side pressure B Above normal low side pressure C Low temperature difference across coil The compressor valves are faulty replace the compressor 33 34 COMPRESSOR REPLACEMENT Recommended procedure for compressor replacement AWARNING
22. limit is in series with the element and will interrupt the power at a designed temperature Should the blower motor fail filter become clogged or air flow be restricted etc the high limit switch will open and interrupt the power to the heater before reaching an un safe temperature condition 230 VOLTS HEATERS 2 5 KW 230 V Resistance 18 61 Ohms 5 Has 2 Limit Switches Primary Opens at 135 F Closes at 130 F Secondary has a One Time Only Open Temp of 200 F 3 4 KW 230 V Resistance 13 68 Ohms 5 Has 2 Limit Switches Primary Opens at 135 F Closes at 130 F Secondary has a One Time Only Open Temp of 200 F 5 KW 230 V Resistance 9 31 Ohms 5 Has 2 Limit Switches Primary Opens at 145 F Closes at 130 F Secondary has a One Time Only Open Temp of 200 F 265 VOLTS HEATERS 2 5 KW 265 V Resistance 24 71 Ohms 5 Has 2 Limit Switches Primary Opens at 135 F Closes at 130 F Secondary Has a One time Only Open Temp of 200 F 3 4 KW 265 V Resistance 18 17 Ohms 5 Has 2 Limit Switches Primary Opens at 145 F Closes at 130 F Secondary has a One Time Only Open Temp of 200 F 5 KW 265 V Resistance 12 35 Ohms 5 Has 2 Limit Switches Primary Opens at 145 F Closes at 130 F Secondary Has a One Time Only Open Temp of 200 F NOTE Always replace with an exact replacement TESTING THE HEATING ELEMENTS AND LIMIT SWITCHES A WARNING ELECTRIC SHOCK
23. or fan continuous mode based on property preference Note Even heat monitoring and quiet start stop fan delay only operate in fan cycle mode Fan continuous mode is used to keep constant airflow circulation in the room during all times the unit is ON Fan cycle will conserve energy by only operating the fan while the compressor or electric heater is operating Dip switch 5 controls the fan mode see Dip Switch setting elsewhere in the manual DIGITAL CONTROL USER INPUT CONFIGURATION The adjustable control dip switches are located at the lower left hand portion of the digital Smart Center The inputs are only visible and accessible with the front cover removed from the PTAC Dip Switch Setting 1 Electronic Temperature Limiting Switches 1 4 The digital control is set from the factory to allow a temperature range between 60 F and 90 F in both heating and cooling mode Dip Switches 1 4 can be used to set high and low limits for either heating or cooling or both Fromthe factory allfourswitches are in the up ON position The charts to the right show the available electronic limiting ranges 2 Fan Cycle Control Switch 5 All PTACs are shipped from the factory with Dip Switch 5 in the OFF position to cycle the fan only when there is a demand for the compressor or heater As an option the fan may be set to continuous mode by switching Dip Switch 5 to ON position to run the fan continuously while the un
24. percentage The instrument will automatically discharge the capacitor when the test switch is released Capacitor Connections The starting winding of a motor can be damaged by a shorted and grounded running capacitor This damage usually can be avoided by proper connection of the running capacitor terminals From the supply line on a typical 230 volt circuit a 115 volt potential exists from the R terminal to ground through a possible short in the capacitor However from the S or start terminal a much higher potential possibly as high as 400 volts exists because of the counter EMF generated in the start winding Therefore the possibility of capacitor failure is much greater when the identified terminal is connected to the S or start terminal The identified terminal should always be connected to the supply line or R terminal never to the 5 terminal When connected properly a shorted or grounded running capacitor will result in a direct short to ground from the terminal and will blow the line fuse The motor protector will protect the main winding from excessive temperature Dual Rated Run Capacitor Hook up FAN MOTOR COM RED DOT RUN CAPACITOR 21 22 COMPONENTS TESTING Continued HEATER ELEMENTS AND LIMIT SWITCHES SPECIFICATIONS All heat pumps and electric heat models are equipped with a heating element and a limit switch bimetal ther mostat The
25. serious property damage WATER DAMAGE HAZARDS e Improper installation maintenance or servicing of the air conditioner unit or not following the above Safety Warnings can result in water damage to personal items or property e Insure that the unit has a sufficient pitch to the outside to allow water to drain from the unit Do not drill holes in the bottom of the drain pan or the underside of the unit e Failure to follow these instructions can result in result in damage to the unit and or minor to serious property damage INTRODUCTION This service manual is designed to be used in conjunction with the installation manuals provided with each unit This service manual was written to assist the professional HVAC service technician to quickly and accurately diagnose and repair any malfunctions of this product This manual therefore will deal with all subjects in a general nature i e All text will pertain to all models IMPORTANT It will be necessary for you to accurately identify the unit you are servicing so you can be certain of a proper diagnosis and repair See Unit Identification Typical Unit Components Discharge Air Grille Blower Wheel Condenser Fan Blade Outdoor Grille Condenser Indoor Blower Housing Shroud Compressor Wall Sleeve Front Cover Control Panel Basepan Gasket UNIT IDENTIFICATION Model Number Code 07 SB A Engineering Digit Series PD P Series Digital PTAC
26. the metering device entrance to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device Frost may continue on the suction line back to the compressor Often a partial restriction of any type can be found by feel as there is a temperature difference from one side of the restriction to the other With a complete restriction there will be no sound at the metering device entrance An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specifi cation With a complete restriction the current drawn may be considerably less than normal as the compressor is running in a deep vacuum no load Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there The following conditions are based primarily on a system in the cooling mode Reversing Valve Head Pressure Lower Outdoor Coll Compressor Gauges will not equalize with unit shut off Completely Restricted System Indoor Coil Outdoor Coil Gauges may equalize very slowly Partially Restricted System 27 28 HERMETIC COMPONENTS CHECK A WARNING BURN HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with a torch E Failure to follow these procedures could result in modera
27. the outdoor coil A WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury 3 Switch the unit to the heating mode and observe the gauge readings after a few minutes running time If the system pressure is lower than normal the heating capillary is restricted 4 Ifthe operating pressures are lower than normal in both the heating and cooling mode the cooling capillary is restricted Failure of the slide in the check valve to seat properly in either mode of operation will cause flooding of the cooling coil This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line COOLING MODE In the cooling mode of operation liquid refrigerant from condenser liquid line enters the cooling check valve forcing the heating check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through cooling capillary tubes to evaporator Note liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode HEATING MODE In the heating mode of operation liquid refrigerant from the indoor coil enters the heating check valve forcing the cooling check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating cap
28. the reversing valve can shift AWARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death Check the operation of the valve by starting the system and switching the operation from Cooling to Heating and then back to Cooling Do not hammer on valve Occasionally the reversing valve may stick in the heating or cooling position or in the mid position When sluggish or stuck in the mid position part of the discharge gas from the compressor is directed back to the suction side resulting in excessively high suction pressure Should the valve fail to shift from coooling to heating block the air flow through the outdoor coil and allow the discharge pressure to build in the system Then switch the system from heating to cooling If the valve is stuck in the heating position block the air flow through the indoor coil and allow discharge pressure to build in the system Then switch the system from heating to cooling Should the valve fail to shift in either position after increasing the discharge pressure replace the valve Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting If you determing this is the probl
29. work out of unit control delivering a more enjoyable experience and eliminating front desk calls By having separate control buttons and indicators for both fan and mode settings the Friedrich digital con trol eliminates the confusion of previous digital PTACs The accurate temperature setting provides greater guest comfort than other systems The fan start and stop delays prevent abrupt changes in room acoustics due to the compressor energizing or stopping immediately Upon call for cooling or heating the unit fan will run for five seconds prior to en ergizing the compressor Also the fan off delay allows for free cooling by utilizing the already cool indoor coil to its maximum capacity by running for 30 seconds after the compressor Some applications require the use of a wall mounted thermostat All new Friedrich PTACs may be switched from unit control to remote thermostat control easily without the need to order a special model or acces sory kit Guests can adjust the temperature and mode of the unit through the use of an optional hand held wireless remote improving guest comfort and relaxation The new Friedrich digital PTAC features a self diagnostic program that can alert maintenance to compo nent failures or operating problems The internal diagnostic program saves properties valuable time when diagnosing running problems The self diagnosis program will also store error codes in memory if certain conditions occur and correct
30. 15K SC A 260 684 00 REV 3 44 PDH15R SC A 260 684 00 REV 3 44 PDH15K SC B 260 684 20 46 PDH15R SC B 260 684 20 46 PDH15K SD A 260 787 00 49 PDH15R SD A 260 787 00 49 PDH15K SD B 260 787 00 49 PDH15R SD B 260 787 00 49 PDH15K SD C 260 787 00 49 PDH15R SD C 260 787 00 49 43 44 WIRING DIAGRAM PART 260 682 00 FOR 230V PLACE 912 AS SHOWN FOR 265V PLACE ON 11 POWER CORD OR FIELD WIRING POWER CORD OR FIELD WIRING m A lt gt 5 Na 5 ch 474 LINE2 or NEUTRAL LF J9 RELAY 5 2 moo WIRING DIAGRAM COOL W O EH WIRES mmm PCB TRACE E CONTROL WIRING DIAGRAM PART 260 682 10 OR FIELD WIRING lt 2 CH On POWER CORD a Ja CAPACITOR RELAY 3 LF J9 RELAY 5 2 or NEUTRAL WIRING DIAGRAM COOL W O EH WIRES mm PCB TRACE E CONTROL 45 46 WIRING DIAGRAM PART 260 682 20 FOR 230V PLACE 12 AS SHOWN FOR 265V PLACE ON 11 OR FIELD WIRING POWER CORD OR FIELD WIRING POWER CORD UN Q 9 RELAY 3 RELAY 4 LF J9 RELAY 5 zi LINE2 or NEUTRAL Ly WIRING DIAGRAM COOL W O EH WIRES TRACE E CONTROL
31. 20 FOR 230V PLACE ON JI2 AS SHOWN FOR 265V PLACE ON Ji1 15 3 2 TRANSFORMER D I POWER CORD OR FIELD WIRING POWER CORD OR FIELD WIRING A 4 lt S LINE2 or NEUTRAL WIRING DIAGRAM HEAT PUMP W ELE HEAT WRES TRACE E CONTROL SAS WIRING DIAGRAM PART 260 785 00 AS9Z NO 30V1d AS9Z NMOHS SV AOE 404 THERMISTORS 7102 G TRANSFORMER lt DE o 53 WIRING DIAGRAM PART 260 786 00 Ee OD COIL FOR 230V PLACE AS SHOWN FOR 265V PLACE ON 265V TRANSFORMER RELAY 1 RELAY 2 RELAY 3 WIRING DIAGRAM COOL W ELEC HEAT WIRING DIAGRAM PART 260 787 00 OD COIL DIS me 0 o lt a gt N a FOR 265V PLACE 265V Mu RELAY 5 No RELAY 4 RELAY 5 RELAY 6 WIRING DIAGRAM HEAT PUMP W ELE HEAT 55 56 REMOTE WALL THERMOSTAT WIRING DIAGRAM COOL W O ELECTRIC HEAT LEGEND 921 600 00 00 LEGEND FOR 5 WIRING HARNESS PART REV R 24VAC Power From Unit Y for Cooling for Heating Reversing valve Energized in heating mode Coll for lew Fon j Coll for Low Fon Call for High Fan RT5 Two Speeds Fan T STAT F eld Provided Field Wiring Electronic THERMOSTAT CONNECTIONS Cont
32. 5 minutes then try again 2 times if fails the only 3rd time then shut down unit Set the temperature sensor 75 F Alternately flash set point and error code Leave unit running Dirty Fan motor failure Restricted air flow Non condensables in refrigeration system Dirty filters Dirty Fan motor failure Restricted airflow Improper refrigerant charge Restriction in refrigerant circuit Store Error Code in memory Unit oversized Keep unit running Low load conditions Store Error Code in memory Unit undersized Keep unit running High load conditions Alternate flash set point and error code Keep Room Freeze Protection triggered Room temperature fell below 40 F unit running Shut down unit Display error code and flash cai Alternately flash set point and error code Open all relays and run high fan If condition repeats three times in one hour shut down unit Defective remote thermostat Defective thermostat wiring Restricted air flow Fan motor failure Test Mode For service and diagnostic use only the built in timers and delays on the PTAC may be bypassed by pressing the Cool and Low Fan buttons simultaneously for three seconds while in any mode to enter the test mode CE will be displayed when entering test mode and UE will be displayed when exiting The test mode will automatically be exited 30 min
33. 6 22 25 301888 43 20 221384 4 15 163917 5 10 122489 144 5 92342 9 5 53807 44 10 41560 50 30 15886 86 35 12698 95 40 10211 14 45 8260 113 50 6718 122 55 5494 11 60 457 140 RESISTANCE VALUES FOR THERMISTORS ON ELECTRONIC CONTROL BOARD Outdoor Coil Discharge Air TEMP Discharge air sensor reisitance K Chr 315 38 15 5 227 27 231 44 235 66 172 37 175 05 177 74 13526 103 61 80 53 62 65 49 22 38 93 37 18 3 3 4 amp 9 50 3776 25 61 321 32 20 76 16 82 13 56 11 42 9 48 7 90 6 61 5 56 w 432 450 469 3 98 90 184 3 19 3 24 3 39 EE 100 212 0 37 100 212 2 27 2 38 2 49 105 221 1 95 2 05 2 15 Uo 2 15 ir E 115 239 0 24 0 25 0 26 115 238 1 45 1 53 1 61 0 21 0 22 120 248 1 26 1 33 IEN Return Air Indoor Coil Return air sensor reisitance Ohm Indoor coil sensor resistence Ohm MIH CENTER MAX MIN CENTER 302 41 208 84 315 38 49 22 80 27 81 33 227 27 231 44 235 66 36 09 37 67 38 36 172 27 175 08 177 74 25 48 28 83 a rmriedrich Friedrich Air Conditioning Company P O Box 1540 San Antonio TX 78295
34. C 260 683 00 REV 3 41 PDE15R SB C 260 683 00 REV 3 41 PDE15K SB D 260 683 00 REV 3 41 PDE15R SB D 260 683 00 REV 3 41 PDE15K SC A 260 683 00 REV 3 44 PDE15R SC A 260 683 00 REV 3 41 PDE15K SC B 260 682 20 40 PDE15R CB B 260 684 10 REV 3 45 PDE15K CB B 260 684 10 REV 3 45 PDE15R SB B 260 684 10 REV 3 45 PDE15K SB B 260 684 10 REV 3 45 PDE15R SC B 260 683 20 43 PDE15K SC B 260 683 20 43 PDE15R SD A 260 785 00 47 PDE15K SD A 260 785 00 47 PDE15R SD A 260 786 00 48 PDE15K SD A 260 786 00 48 PDE15R SD B 260 785 00 47 PDE15K SD B 260 785 00 47 PDE15R SD C 260 785 00 48 PDE15K SD B 260 786 00 48 PDE15R SD B 260 786 00 47 PDE15K SD C 260 785 00 47 PDE15R SD C 260 786 00 48 PDE15K SD C 260 786 00 48 MODEL WIRING DIAGRAM PAGE MODEL WIRING DIAGRAM PAGE PDH15K PDH15R PDH15K CB B 260 682 10 REV 3 39 PDH15R CB B 260 682 10 REV 3 39 PDH15K CB B 260 683 10 REV 3 42 PDH15R CB B 260 683 10 REV 3 42 PDH15K SB B 260 682 10 REV 3 39 PDH15R SB B 260 682 10 REV 3 39 PDH15K SB B 260 683 10 REV 3 42 PDH15R CB A 260 684 00 REV 3 44 PDH15K CB A 260 684 00 REV 3 44 PDH15R CB B 260 684 10 REV 3 45 PDH15K CB B 260 684 10 REV 3 45 PDH15R CB C 260 684 00 REV 3 44 PDH15K CB C 260 684 00 REV 3 44 PDH15R SB A 260 684 00 REV 3 44 PDH15K SB A 260 684 00 REV 3 44 PDH15R SB B 260 683 10 REV 3 42 PDH15K SB B 260 684 10 REV 3 45 PDH15R SB B 260 684 10 REV 3 45 PDH15K SB C 260 684 00 REV 3 44 PDH15R SB C 260 684 00 REV 3 44 PDH15K SB D 260 684 00 REV 3 44 PDH15R SB D 260 684 00 REV 3 44 PDH
35. EO9R CB A 260 682 00 REV 3 38 PDEO9K CB A 260 683 00 REV 3 41 PDEO9R CB A 260 683 00 REV 3 41 PDEO9K CB C 260 683 00 REV 3 41 PDEO9R CB C 260 683 00 REV 3 41 PDEO9K CB D 260 683 00 REV 3 A1 PDEO9R CB D 260 683 00 REV 3 41 PDEO9K SB A 260 682 00 REV 3 38 PDEO9R SB A 260 683 00 REV 3 41 PDEO9K SB A 260 682 00 REV 3 38 PDEO9R SB C 260 683 00 REV 3 41 PDEO9K SB A 260 683 00 REV 3 41 PDEO9R SB D 260 683 00 REV 3 41 PDEOOK SB C 260 683 00 REV 3 41 PDEO9R SC A 260 683 00 REV 3 41 PDEOOK SB D 260 683 00 REV 3 41 PDEO9R SC B 260 683 20 43 PDEOOK SC A 260 683 00 REV 3 41 PDEO9R SD A 260 785 00 AT PDEOOK SC B 260 682 20 40 PDEO9R SD A 260 786 00 48 PDEOOK SC B 260 683 20 43 PDEO9R SD B 260 785 00 AT PDEO9K SD A 260 785 00 47 PDEO9R SD B 260 786 00 48 PDEOOK SD A 260 786 00 48 PDEO9R SD C 260 785 00 AT PDEO9K SD B 260 785 00 47 PDEO9R SD C 260 786 00 48 PDEOOK SD B 260 786 00 48 PDEO9K SD C 260 785 00 47 PDEOOK SD C 260 786 00 48 MODEL WIRING DIAGRAM PAGE MODEL WIRING DIAGRAM PAGE PDHO9K PDHO9R PDHO9K CB A 260 684 00 REV 3 44 PDHO9R CB A 260 684 00 REV 3 44 PDHO9K CB C 260 684 00 REV 3 44 PDHO9R CB C 260 684 00 REV 3 44 PDHO9K SB A 260 684 00 REV 3 44 PDHO9R SB A 260 684 00 REV 3 44 PDHO9K SB C 260 684 00 REV 3 44 PDHO9R SB C 260 684 00 REV 3 44 PDHO9K SB D 260 684 00 REV 3 44 PDHO9R SB D 260 684 00 REV 3 44 PDHO9K SC A 260 684 00 REV 3 44 PDHO9R SC A 260 684 00 REV 3 44 PDHO9K SC B 260 684 20 46 PDHO9R SC B 260 684 20 46 PDHO9K SD A 260 787 00 49 PDHO9R SD
36. NING BURN HAZARD Proper safety procedures must be followed mg and proper protective clothing must be worn when working with a torch oM ucl smi Failure to follow these procedures could result in moderate or serious injury 8 Crimp the process tube and solder the end shut 25 A WARNING A WARNING ELECTRIC SHOCK HAZARD HIGH PRESSURE HAZARD Turn off electric power before service or Sealed Refrigeration System contains refrigerant installation d and oil under high pressure Extreme care must be used if it becomes wi Proper safety procedures must be followed necessary to work on equipment with power and proper protective clothing must be worn applied when working with refrigerants Failure to do so could result in serious injury or Failure to follow these procedures could death result in serious injury or death Undercharged Refrigerant Systems A check of the amperage drawn by the compressor undercharged system will result in poor performance motor should show lower reading Check the Unit low pressures etc in both the heating and cooling Specification After the unit has run 10 to 15 minutes cycle check the gauge pressures Gauges connected to system with an undercharge will have low head pressures and Whenever you servi nit with an undercharge of 72 22 9 substantially low suction pressures refrigerant always suspect a leak The leak must be repaired before charging
37. PTAC design determines at exactly what point in the condenser the change of state i e gas to a liquid takes place In all cases however the refrigerant must be totally condensed changed to a Liquid before leaving the condenser coil I Suction Line Metering Device The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant drier if so equipped It is the function of the drier to trap any moisture presentin the system contaminants and large particulate matter The liquid refrigerant next enters the metering device The metering device is a capillary tube The purpose of the metering device is to meter i e control or measure the quantity of refrigerant entering the evaporator coil In the case of the capillary tube this is accomplished by design through size and length of device and the pressure difference present across the device Since the evaporator coil is under a lower pressure due to the suction created by the compressor than the liquid line the liquid refrigerant leaves the metering device entering the evaporator coil As it enters the evaporator coil the larger area and lower pressure allows the refrigerant to expand and lower its temperature heat intensity This expansion is often referred to as boiling Since the unit s blower is moving indoor air across the finned surface of the evaporator coil t
38. at generated within the compressor shell usually due to recycling of the motor is slow to dissipate It may take anywhere from a few minutes to several hours for the overload to reset Checking the Overload A WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death A WARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns Proper safety procedures must be followed and proper protective clothing must be worn anl premi teg Failure to follow this warning could result in moderate to serious injury External Overload With power off remove the leads from compressor termi nals If the compressor is hot allow the overload to cool before starting check Using an ohmmeter test continu ity across the terminals of the external overload If you do not have continuity this indicates that the overload is open and must be replaced OHMMETER ROTARY COMPRESSOR TOP VIEW Single Phase Resistance Test AWARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Remove the leads from the compressor terminals and se
39. ay take action and shut the unit off until conditions are corrected To access the error code menu press the Heat and High Fan buttons simultaneously for three seconds If error codes are present they will be displayed If multiple codes exist you can toggle between messages using the temp A button To clear all codes press the temp button for three seconds while in the error code mode To exit without changing codes press the Low Fan button EF Error Free Test Mode For service and diagnostic use only the built in timers and delays on the PTAC may be bypassed by pressing the Cool and Low Fan buttons simultaneously for three seconds while in any mode to enter the test mode will be displayed when entering test mode will be displayed when exiting The test mode will automatically be exited 30 minutes after entering it or by pressing the Cool and Low Fan buttons simultaneously for three seconds Note To access the Test Mode while under remote wall thermostat operation remove thermostat s wires at the terminal block on the electronic control board then connect a jumper wire between GL and GH COMPONENTS TESTING BLOWER FAN MOTOR A single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan A self resetting overload is located inside the motor to protect against high temperature and high amperage conditions AWARNING
40. both items thoroughly with water and ensure that the drain outlets are operating correctly Check the sealant around the sleeve and reseal areas as needed FRONT COVER Clean the front cover when needed Use a mild detergent Wash and rinse with warm water Allow it to dry thoroughly before reinstalling it in the chassis Discharge Air Grille Blower Wheel Condenser Fan Blade Indoor Blower Housing Condenser Gasket Shroud Wall Sleeve Front Cover Control Panel Basepan Gasket 37 38 TROUBLESHOOTING CHART COOLING REFRIGERANT SYSTEM DIAGNOSIS COOLING PROBLEM PROBLEM PROBLEM PROBLEM Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across Indoor Coil Indoor Coil Restriction Outdoor Coil Refrigerant System Reversing Valve not Reversing Valve not Overcharged Restriction Fully Seated Fully Seated Undercharged Overcharged Undercharged System Non Condensables air Defective Compressor Defective Compressor TROUBLESHOOTING CHART HEATING REFRIGERANT SYSTEM DIAGNOSIS HEATING PROBLEM PROBLEM PROBLEM PROBLEM LOW SUCTION PRESSURE HIGH SUCTION PRESSURE LOW HEAD PRESSURE HIGH HEAD PRESSURE Low Air Flow Across Outdoor Ambient Too High Refrigerant System Outdoor Ambient Too High Outdoor Coil for Operation in Heating Restriction For Operation In Heating Refrigerant System Reversing Valve not Reversing Valve not Low Air
41. check valve and the interconnecting tubing These warranties apply only while the unit remains at the original site and only to units installed inside the continental United States Alaska Hawaii Puerto Rico and Canada The warranty applies only if the unit is installed and operated in accordance with the printed instructions and in compliance with applicable local installation and building codes and good trade practices For international warranty information contact the Friedrich Air Conditioning Company International Division Reasonable proof must be presented to establish the original purchase date otherwise the beginning date of this certificate will be considered to be our shipment date plus sixty days Replacement parts can be new or remanufactured Replacement parts and labor are only warranted for any unused portion of the unit s warranty We will not be responsible for and the user will pay for 1 Service calls to A Instruct on unit operation B Replace house fuses or correct house wiring C Clean or replace air filters D Remove the unit from inaccessible locations E Correct improper installations 2 Parts or labor provided by anyone other than an authorized service center 3 Damage caused by A Accident abuse negligence misuse riot fire flood or acts of God B Operating the unit where there is a corrosive atmosphere containing chlorine fluorine or any damaging chemicals other than in a normal residential env
42. cord and be within reach of service cord Refer to Table 1 for proper receptacle and fuse type Do NOT alter the service cord or plug Do NOT use an extension cord Table 2 Recommended branch circuit wire sizes NAMEPLATE MAXIMUM 7 CIRCUIT BREAKER SIZE AWG WIRE SIZE 14 15 20 30 AWG American Wire Gauge The field supplied outlet must match plug Single circuit from main box on service cord and be within reach of Based on copper wire single insulated conductor at 60 C service cord Refer to Table 1 for proper receptacle and fuse type Do NOT alter the service cord or plug Do NOT use an extension cord RECEPTACLE Use recommended wire size given in Table 2 and install a single branch circuit All wiring must comply with local and national codes NOTE Use copper conductors only 11 12 POWER CORD INFORMATION 230 208V MODELS ONLY All Friedrich 230 208V PTAC units are shipped from the factory with a Leakage Current Detection Interrupter LCDI equipped power cord The LCDI device meets the UL and NEC requirements for cord connected air conditioners effective August 2004 To test your power supply cord 1 Plug power supply cord into a grounded 3 prong outlet 2 Press RESET 3 Press TEST listen for click Reset button trips and pops out 4 Press and release RESET listen for click Reset button latches and remains in The power supply cord is ready for operation 15 20A LCDI Dev
43. e control configuration matches that of the PTAC unit Manual Changeover Thermostat For Heat Pump equipped units A single stage heat cool thermostat with a terminal for a reversing valve operation is required Terminal B should be continuously energized in the heat mode and terminal should be energized whenever there is a call for heating or cooling Typically a single stage heat cool thermostat designed for use with electric heat systems will meet the above requirements To control the unit with a wall mounted thermostat follow the steps below 1 With the front cover removed locate the low voltage terminal strip at the lower portion of the Smart Center 2 Remove the jumper between the GL and GH terminals 3 The control is now configured for control by a wall thermostat The Smart Center will no longer control the unit 4 If desired the accessory escutcheon kit PDXRT is to be used install it over the existing control panel Note To revert back to the Smart Center control of the unit replace the jumper wire between the GL and GH terminals that was removed in step 1 Remote Thermostat Control Heat Pump with Electric Heat Operation When there is a call for heat from the wall thermostat the control board will receive signals on terminals W B GL or GH During compressor lock out time the electric heat will turn on first When the compressor lock out time is up the compressor will
44. e method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning In case of any questions regarding the provisions of this warranty the English version will govern 10 08 TECHNICAL SUPPORT CONTACT INFORMATION rriedrich FRIEDRICH AIR CONDITIONING CO Post Office 1540 San Antonio Texas 78295 1540 4200 Pan Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com Printed in the U S A Printed in the U S A PD ServMan 04 09
45. ector G E Type H 6 or equivalent 8 Accurate refrigerant charge measuring device such as a Balance Scales 1 2 oz accuracy b Charging Board 1 2 oz accuracy WARNING RISK OF ELECTRIC SHOCK Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death Refrigerant Charging Proper refrigerant charge is essential to proper unit opera tion Operating a unit with an improper refrigerant charge will result in reduced performance capacity and or efficiency Accordingly the use of proper charging methods during ser vicing will insure that the unit is functioning as designed and that its compressor will not be damaged 9 High Pressure Gauge 0 400 165 10 Low Pressure Gauge 30 150 Ibs 11 Vacuum Gauge 0 1000 microns EQUIPMENT MUST BE CAPABLE OF 1 Recovery CFC s as low as 5 2 Evacuation from both the high side and low side of the system simultaneously 3 Introducing refrigerant charge into high side of the system 4 Accurately weighing the re
46. em replace the reversing valve After all of the previous inspections and checks have been made and determined correct then perform the Touch Test on the reversing valve FROM OUTDOOR COIL TO COMPRESSOR SUCTION HOT BOTH THE SAME TEMPERATURE Reversing Valve in Heating Mode TO OUTDOOR COIL TO COMPRESSOR SUCTION BOTH THE SAME TEMPERATURE BOTH THE SAME EMPERATURE FROM COMPRESSOR DISCHARGE Reversing Valve in Cooling Mode Touch Test in Heating Cooling Cycle AWARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns a Proper safety procedures must be followed and proper protective clothing must be worn Failure to follow these procedures could result in minor to moderate injury The only definite indications that the slide is in the mid position is if all three tubes on the suction side of the valve are hot after a few minutes of running time NOTE A condition other than those illustrated above and on Page 31 indicate that the reversing valve is not shifting properly Both tubes shown as hot or cool must be the same corresponding temperature Procedure For Changing Reversing Valve AWARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failu
47. emp 40 F Alternate flash set point and error code Leave unit running Set OD coil temp 20 F Alternate flash set point and error code Automatically change over to Elec tric heat Mode only Leave unit running Dirty Fan motor failure Restricted air flow Non condensables in refrigeration system Dirty filters Dirty Fan motor failure Restricted airflow Improper refrigerant charge Restriction in refrigerant circuit 8 If unit cycles Heat or Cool demand gt 9 Alternate flash set point and error code Unit oversized times per hour Keep unit running Low load conditions If unit cycles Heat or Cool demand 3 Alternate flash set point and error code Unit undersized Keep unit running High load conditions times per hour Room Freeze Protection triggered Alternate flash PONE and Room temperature fell below 40 F Keep unit running Alternate flash set point and error code Continue fan operation while the compressor is locked out until the indoor coil thermistor reaches 45 F and then energize the compressor However compressor must still wait a lockout time of 180 to 240 seconds coil temperature lt 30 Deg for 2 con secutive minutes 20 Diagnostics The Friedrich Smart Center continuously monitors the PTAC unit operation and will store service codes if certain conditions are witnessed In some cases the unit m
48. f the front cover Friedrich PTAC units are capable of introducing up to 70 CFM of outside air into the conditioned space The outdoor air passes through a washable mesh fi Iter to prevent debris from entering the airstream 15 16 DIGITAL CONTROL OPERATION Temperature Display The Friedrich digital PTAC is shipped from the factory to display the Set Point desired room temperature on the LED readout The unit can be configured to display the room temperature by simultaneously pressing the Cool and High Fan buttons for three seconds The display will show R for one second to acknowledge the change The unit will then display the Set Point whenever the Temperature Up A or Temperature Down buttons are pressed then switch back to display actual room temperature To revert back to the factory setting displaying the Set Point only press the Cool and High Fan buttons simultaneously for three seconds The unit will display an 5 for one second to acknowledge the change F vs C Display The unit is factory configured to display all temperatures in degrees Fahrenheit F To switch to degrees Celsius press the Fan Only and Low Fan buttons simultaneously for three seconds The display will show a C as acknowledgement of the change To revert back to degrees Fahrenheit press the Fan Only and Low Fan buttons simultaneously for three seconds The di
49. frigerant charge actually introduced into the system 5 Facilities for flowing nitrogen through refrigeration tubing during all brazing processes Too much refrigerant overcharge in the system is just as bad if not worse than not enough refrigerant undercharge They both can be the source of certain compressor failures if they remain uncorrected for any period of time Quite often other problems such as low air flow across evaporator etc are misdiagnosed as refrigerant charge problems The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems An overcharged unit will at times return liquid refrigerant slugging back to the suction side of the compressor eventually causing a mechanical failure within the compressor This mechanical failure can manifest itself as valve failure bearing failure and or other mechanical failure The specific type of failure will be influenced by the amount of liquid being returned and the length of time the slugging continues Not enough refrigerant undercharge on the other hand will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor When this occurs the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compressor overload protector Continued overheating of the motor windings and or cycling of the overload will eventually lead
50. he expanding refrigerant absorbs some of that heat This results in a lowering of the indoor air temperature hence the cooling effect The expansion and absorbing of heat cause the liquid refrigerant to evaporate i e change to a gas Once the refrigerant has been evaporated changed to a gas it is heated even further by the air that continues to flow across the evaporator coil The particular system design determines at exactly what point in the evaporator the change of state i e liquid to a gas takes place In all cases however the refrigerant must be totally evaporated changed to a gas before leaving the evaporator coil The low pressure suction created by the compressor causes the refrigerant to leave the evaporator through the suction line as a cool low pressure vapor The refrigerant then returns to the compressor where the cycle is repeated Compressor Refrigerant Drier Liquid Line Refrigerant Strainer 23 24 SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT ANY SEALED SYSTEM REPAIRS TO COOL ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER ALSO ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER EQUIPMENT REQUIRED 1 Voltmeter Ammeter 2 3 Ohmmeter 4 E PA Approved Refrigerant Recovery System 5 Vacuum Pump capable of 200 microns or less vacuum Acetylene Welder 7 Electronic Halogen Leak Det
51. ice Reset Button NOTE The LCDI device is not intended to be used as a switch Once plugged in the unit will operate normally without the need to reset the LCDI device If the LCDI device trips and requires resetting the cause of the trip should be identified prior to further use of the PTAC If the device fails to trip when tested or if the power supply cord is damaged it must be replaced with a new supply cord obtained from the product manufacturer and must not be repaired Typical 30A LCDI Device Reset Button REMOTE THERMOSTAT AND LOW VOLTAGE CONTROL CONNECTIONS Room Thermostats Room thermostats are available from several different manufacturers in a wide variety of styles They range from the very simple Bimetallic type to the complex electronic set back type In all cases no matter how simple or complex they are simply a switch or series of switches designed to turn equipment or components or OFF at the desired conditions An improperly operating or poorly located room thermostat can be the source of perceived equipment problems A careful check of the thermostat and wiring must be made then to insure that it is not the source of problems Remote Thermostat All Friedrich PD model PTAC units are factory configured to be controlled by either the chassis mounted Smart Center or 24V single stage remote wall mounted thermostat The thermostat may be auto or manual changeover as long as th
52. illary tubes to outdoor coils Note liquid refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode REVERSING VALVE DESCRIPTION OPERATION AWARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death The Reversing Valve controls the direction of refrigerant flow to the indoor and outdoor coils It consists of a pressure operated main valve and a pilot valve actuated by a solenoid plunger The solenoid is energized during the heating cycle only The reversing valves used in the PTAC system is a 2 position 4 way valve The single tube on one side of the main valve body is the high pressure inlet to the valve from the compressor The center tube on the opposite side is connected to the low pressure suction side of the system The other two are connected to the indoor and outdoor coils Small capillary tubes connect each end of the main valve cylinder to the PILOT SOLENOID VALVE FROM COMPRESSOR DISCHARGE A and B ports of the pilot valve Athird capillary is common return line from these ports to the suction tube on the main valve body Four way reversing valves also have a capillary tube from the compressor discharge tube to the pilot valve The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of
53. ining the efficiency benefits of a heat pump The owner may choose between fan cycling or fan continuous mode based on property preference Note Even heat monitoring and quiet start stop fan delay only operate in fan cycle mode Fan continuous mode is used to keep constant airflow circulation in the room during all times the unit is ON Fan cycle will conserve energy by only operating the fan while the compressor or electric heater is operating In the event of a compressor failure in heat pump mode the compressor may be locked out to provide heat through the resistance heater This feature ensures that even in the unlikely event of a compressor failure the room temperature can be maintained until the compressor can be serviced All Friedrich digital PTACs have low voltage terminals ready to connect a desk control energy management system Controlling the unit from a remote location like the front desk can reduce energy usage and requires no additional accessories at the PTAC The frost sensor protects the compressor from damage in the event that airfl ow is reduced or low outdoor temperatures cause the indoor coil to freeze When the indoor coil reaches 30 F the compressor is diabled and the fan continues to operate based on demand Once the coil temperature returns to 45 F the compressor returns to operation The new Friedrich PD series units feature a indoor fan system design that reduces sound levels without lowering airflow and preve
54. ironment C Unauthorized alteration or repair of the unit which in turn affects its stability or performance D Failing to provide proper maintenance and service E Using an incorrect power source F Faulty installation or application of the unit We shall not be liable for any incidental consequential or special damages or expenses in connection with any use or failure of this unit We have not made and do not make any representation or warranty of fitness for a particular use or purpose and there is no implied condition of fitness for a particular use or purpose We make no expressed warranties except as stated in this certificate No one is authorized to change this certificate or to create for us any other obligation or liability in connection with this unit Any implied warranties shall last for one year after the original purchase date Some states and provinces do not allow limitations on how long an implied warranty or condition lasts so the above limitations or exclusions may not apply to you The provisions of this warranty are in addition to and not a modification of or subtraction from the statutory warranties and other rights and remedies provided by law Performance of Friedrich s Warranty obligation is limited to one of the following methods 1 Repair of the unit 2 A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit 3 Providing a replacement unit of equal value Th
55. it is powered on To ensure that the room temperature is maintained evenly while in fan cycle mode the Even Temp Load Anticipation feature is enabled Quiet Fan Delay is also enabled in fan cycle mode to lessen the acoustical change between compressor start up and shut off by running the fan for 5 seconds before each demand cycle and 30 seconds after cooling or 15 seconds after heating cycles 3 Room Freeze Protection Switch 6 Units are shipped from the factory with the room freeze protection disabled Room Freeze Protection can be switched on at the owner s preference by moving Dip Switch 6 to ON This feature will monitor the indoor room conditions and in the event that the room falls below 40 F the unit will cycle on high fan with the electric heater This occurs regardless of mode 4 Emergency Heat Override Switch 7 In the unlikely event of a compressor failure a heat pump unit may be switched to operate in only the electric heat mode until repairs can be made Moving Dip Switch 7 to ON Heating Range Switches 1 amp 2 Note In order for the control to recognize Dip switch setting changes the PTAC must be disconnected from power supply when making any configuration changes 17 18 Optional Hand Held Remote Control Operation The electronic control can be configured to operate via an optional hand held remote control for added convenience The PTAC control board comes shipped with all of
56. k free install solenoid coil on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating plate Crimp the process tubes and solder the ends shut Do not leave Schrader or piercing valves in the sealed system NOTE When brazing a reversing valve into the system it is of extreme importance that the temperature of the valve does not exceed 250 F at any time Wrap the reversing valve with a large rag saturated with water Re wet the rag and thoroughly cool the valve after each brazing operation of the four joints involved The wet rag around the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection 31 32 COMPRESSOR CHECKS WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Locked Rotor Voltage L R V Test Locked rotor voltage L R V is the actual voltage available at the compressor under a stalled condition Single Phase Connections Disconnect power from unit Using a voltmeter attach one lead of the meter to the run terminal on the compressor and the other lead to the common terminal of the com pressor Restore power to unit Determine L R V Start the compressor with the volt meter attached
57. l panel and sleeve on the room side of the air conditioning unit while cleaning Electrical component malfunction caused by water could result in electric shock or other electrically unsafe conditions when the power is restored and the unit is turned on even after the exterior is dry Never operate the A C unit with wet hands Use air conditioner on a single dedicated circuit within the specified amperage rating Use on a properly grounded outlet only Do not remove ground prong of plug Do not cut or modify the power supply cord Do not use extension cords with the unit Follow all safety precautions and use proper and adequate protective safety aids such as gloves goggles clothing adequately insulated tools and testing equipment etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death REFRIGERATION SYSTEM HAZARDS Use approved standard refrigerant recovering procedures and equipment to relieve pressure before opening system for repair Do not allow liquid refrigerant to contact skin Direct contact with liquid refrigerant can result in minor to moderate injury Be extremely careful when using an oxy acetylene torch Direct contact with the torch s flame or hot surfaces can cause serious burns Make sure to protect personal and surrounding property with fire proof materials Have a fire extinguisher at hand while using a torch Provide adequate ventilation to vent off t
58. lean the unit air intake filter at least every 300 to 350 hours of operation Clean the filters with a mild detergent in warm water and allow to dry thoroughly before reinstalling COILS AND BASE PAN WARNING NOTICE EXCESSIVE WEIGHT HAZARD Do not use a caustic coil cleaning agent on coils or base Use two people to lift or carry the unit and wear pan Use a biodegradable cleaning agent and degreaser proper protective clothing to prevent damage to the coil and or base pan Failure to do so may result in personal injury A WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury The indoor coil evaporator coil the outdoor coil condenser coil and base pan should be inspected periodically yearly or bi yearly and cleaned of all debris lint dirt leaves paper etc Clean the coils and base pan with a soft brush and compressed air or vacuum If using a pressure washer be careful not to bend the aluminium fin pack Use a sweeping up and down motion in the direction of the vertical aluminum fin pack when pressure cleaning coils Cover all electrical components to protect them from water or spray Allow the unit to dry thoroughly before reinstalling it in the sleeve BLOWER WHEEL HOUSING CONDENSER FAN SHROUD Inspect the indoor blower housing evaporator blade condenser fan blade and condenser shroud periodically yea
59. low proper safety procedures result in serious injury or death 1 Recover all refrigerant and oil from the system 2 Remove compressor capillary tube and filter drier from the system 3 Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent Use approved flushing agent to remove all contamination from system Inspect suction and discharge line for carbon deposits Remove and clean if necessary Ensure all acid is neutralized 4 Reassemble the system including new drier strainer and capillary tube 5 Proceed with step 8 10 on previous page ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE Basically troubleshooting and servicing rotary compres sors is the same as on the reciprocating compressor with only one main exception NEVER under any circumstances charge a rotary com pressor through the LOW side Doing so would cause permanent damage to the new compressor 35 36 ROUTINE MAINTENANCE A WARNING NOTICE ELECTRIC SHOCK HAZARD Units are to be inspected and serviced by qualified service Turn off electric power before inspections personnel only Use proper protection on surrounding maintenances or service property Failure to follow this notice could result in moderate or serious property damage Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death AIR FILTER C
60. m Cal RATING POINT ARI 310 380 OUTDOOR DRY BULB TEMP DEGREES F 47 5 8 1344 RATING POINT ARI 310 380 CHASSIS SPECIFICATIONS FOR 2008 MODELS PDE Series Chassis Specifications mem PERFORMANCE DATA Dehumidification 21 Sensible Heat Ratio 0 76 0 75 ELECTRICAL DATA Voltage 1 Phase 60 Hz 230 208 230 208 Volt Range 253 198 253 198 Current Amps 2 9 37 35 2 ss Power Factor 09 09 09 09 Amps LR 18 22 2 Amps FL 29 34 _ 31 48 42 6 6 Horsepower 1 15 1 15 AIRFLOW DATA Indoor CFM High 250 250 250 Indoor CFM Low 200 200 Vent CFM a 605 0 0 no PHYSICAL DATA 16x 42x 13 5 16x 42 x 13 5 105 123 31 PDH Series Chassis Specifications PDHO mm mae PDHOR PDHIX mm mua ma 7200 595 12 1 113 6400 8100 7900 8100 568 791 772 791 33 3 0 38 0 72 0 72 265 230 208 292 239 253 198 292 239 PERFORMANCE DATA Cooling BTUh 7200 7000 Power Watts Cool 595 579 EER 12 1 Heat Pump BTUh 6400 6200 Power Watts Heat 568 550 313 211 0 76 Jo 2 0 75 Dehumidification Sensible Heat Ratio ELECTRICAL DATA Voltage 1 Phase 60 Hz Volt Range Current Amps Heat Pump Amps Power Factor Amps L R Amps F L Horsepower AIRFLOW DATA Indoor CFM High Indoor CFM Low 7200 7000 597 Hea
61. nt Follow all safety recommended precautions and protect surrounding areas with fire proof materials Have a fire extinguisher readily available Failure to follow this notice could result in moderate to serious property damage 3 After all refrigerant has been recovered disconnect suction and discharge lines from the compressor and remove compressor Be certain to have both suction and discharge process tubes open to atmosphere 4 Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean container 5 Using an acid test kit one shot or conventional kit test the oil for acid content according to the instructions with the kit 6 If any evidence of a burnout is found no matter how slight the system will need to be cleaned up following proper procedures 7 Install the replacement compressor WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures result in serious injury or death 8 Pressurize with a combination of R 22 and nitrogen and leak test all connections with an electronic or Halide leak detector Recover refrigerant and repair any leaks found Repeat Step 8 to insure no more leaks are present 9 Evacuate the system with a good vacuum pump capable of a final vacuum of 300 microns or less The system should be evacuated
62. nting proper air circulation The Friedrich PTAC benefits quality components and extensive development to ensure a quiet efficient and dependable unit Friedrich s single motor design allows for enhanced outdoor airflow and simplifies the unit design without the need for redundant components High efficiency rotary compressors are used on all Friedrich PTACs to maximize durability and efficiency The Friedrich PTAC features a 24V AC terminal for connection to an auxiliary fan that may be used to transfer air to adjoining rooms Auxiliary fans can provide conditioning to multiple rooms without the requirement of multiple PTAC units All Friedrich PTACs are built with 04 endplates made from aluminum as opposed to steel The endplates are typically the most susceptible area for corrosion and aluminum is far more resistant to corrosion than even coated steel Optional Seacoast protection is available to protect the outdoor coil from harsh environments The Friedrich Seacoast process includes dipping the entire outdoor coil in a 7 step coating process that provides superior protection to only coating the fins of the coil All Friedrich PTAC return air filters feature an anti microbial element that has proven to prevent mold and bacterial growth in laboratory testing PDXFT replacement filter kits feature the same anti microbial agent All filters are washable and reusable and are easily accessed from the top of the unit without the removal o
63. ode mode To exit without changing codes press the Low Fan button Button Location with Optional PDXRT Escutcheon Kit Installed If the remote escutcheon kit is installed the button loca tions to access the diagnostics and tests modes can be located as shown below Cool EN Heat Temp O 9 Temp O Fan only Friedrich High fan O O Power Low fan Digital Control Diagnostics and Test Mode The chart below lists the possible error codes and their description for Electronic Board Part 250 800 00 GE CODE TRANSLATION ACTION TAKEN BY UNIT POSSIBLE CAUSE An extreme low voltage condition exists lt 198V for 230V units and lt 239V for 265V units n3 Return air thermistor sensor open or short Sa circuit Ou Indoor coil thermistor sensor open or short z circuit Outdoor coil thermistor sensor open or short circuit Shut down unit Display Error code and flash Once volt age rises to normal level system power is restored Set return air sensor 75 F Alternate flash set point and error code Leave unit running Set ID coil temp 40 F Alternate flash set point and error code Leave unit running Inadequate power supply Defective breaker Blown fuse Set OD coil temp 20 F Alternate flash set point and error code Automatically change over to Elec Defective sensor t
64. oxic fumes and work with a qualified assistant whenever possible Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks flushing etc Make sure to follow all safety precautions and to use proper protective safety aids such as gloves safety glasses clothing etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death MECHANICAL HAZARDS Extreme care proper judgment and all safety procedures must be followed when testing troubleshooting handling or working around unit with moving and or rotating parts Be careful when handling and working around exposed edges and corners of sleeve chassis and other unit components especially the sharp fins of the indoor and outdoor coils Use proper and adequate protective aids such as gloves clothing safety glasses etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death PROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDS e Read the Installation Operation Manual for this air conditioning unit prior to operating Use air conditioner on a single dedicated circuit within the specified amperage rating e Connect to a properly grounded outlet only Do not remove ground prong of plug Do not cut or modify the power supply cord Do not use extension cords with the unit e Failure to follow these instructions can result in fire and minor to
65. re to follow these procedures could result in serious injury or death NOTICE FIRE HAZARD The use of a torch requires extreme care and proper judgment Follow all safety recommended precautions and protect surrounding areas with fire proof materials Have a fire extinguisher readily available Failure to follow this notice could result in moderate to serious property damage 1 Install Process Tubes Recover refrigerant from sealed system PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED 2 Remove solenoid coil from reversing valve If coil is to be reused protect from heat while changing valve 3 Unbraze all lines from reversing valve 4 Clean all excess braze from all tubing so that they will slip into fittings on new valve 5 Remove solenoid coil from new valve 6 Protect new valve body from heat while brazing with plastic heat sink Thermo Trap or wrap valve body with wet rag T Fit all lines into new valve and braze lines into new valve AA WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures could result in serious injury or death 8 Pressurize sealed system with a combination of R 22 and nitrogen and check for leaks using a suitable leak detector Recover refrigerant per EPA guidelines 9 Once the sealed system is lea
66. resistance heaters and not the compressor When the outdoor coil temperature reaches 45 F the compressor will be allowed to operate again Digital Control Panel Friedrich Power suanr CENTER E Heat Cool Models PDE After pressing the Heat button adjust the temperature readout to the desired room temperature and the unit will cycle the resistance heat on and off to maintain a comfortable room The heater will come on anytime that the room temperature is 1 8 F below the desired temperature The fan operation is dependent on the fan mode selected either continuous or cycling Dip switch 5 controls the fan mode see Dip Switch setting elsewhere in the manual Emergency Heat Operation In the event of a compressor failure in heat pump mode the compressor may be locked out to provide heat through the resistance heater This feature ensures that even in the unlikely event of a compressor failure the room temperature can be maintained until the compressor can be serviced Dip switch 7 controls the emergency heat setting see Dip Switch setting elsewhere in the manual Fan Mode Fan Only Pressing the Fan Only button will run the fan to allow for air circulation in the room without operating the compressor or heater regardless of the room or set temperature The fan Speed selection is made by pressing either the High Fan or Low Fan button Cycle Continuous The owner may choose between fan cycling
67. ric heat Mode only Leave unit running If O D coil Temperature gt 175 Deg for 2 consecutive minutes Heat Pump models Alternate flash set point and error code Continue fan operation while the compressor is locked out until the indoor coil thermistor reaches 45 F and then energize the compressor However compressor must still wait a lockout time of 180 to 240 seconds coil temperature lt 30 Deg for 2 con secutive minutes Unit cycles Heat or Cool demand gt 9 times per hour Unit cycles Heat or Cool demand lt 3 times per hour Non Signal to GL or GH terminal Remote Thermostat mode only Discharge air temperature gt 185 F 14 Discharge air temperature sensor open shorted Diagnostics The Friedrich Smart Center continuously monitors the PTAC unit operation and will store service codes if certain conditions are witnessed In some cases the unit may take action and shut the unit off until conditions are corrected To access the error code menu press the Heat and High Fan buttons simultaneously for three seconds If error codes are present they will be displayed If multiple codes exist you can toggle between messages using the temp button To clear all codes press the temp button for three seconds while in the error code mode To exit without changing codes press the Low Fan button EF Error Free Alternate flash set point and error code Shut unit down for
68. rly or bi yearly and clean of all debris lint dirt mold fungus etc Clean the blower housing area and blower wheel with an antibacterial antifungal cleaner Use a biodegradable cleaning agent and degreaser on condenser fan and condenser shroud Use warm or cold water when rinsing these items Allow all items to dry thoroughly before reinstalling them ELECTRONIC ELECTRICAL MECHANICAL Periodically at least yearly or bi yearly inspect all control components electronic electrical and mechanical as well as the power supply Use proper testing instruments voltmeter ohmmeter ammeter wattmeter etc to perform elec trical tests Use an air conditioning or refrigeration thermometer to check room outdoor and coil operating tempera tures Use a sling psychrometer to measure wet bulb temperatures indoors and outdoors Inspect the surrounding area inside and outside to ensure that the unit s clearances have not been compromised or altered ROUTINE MAINTENANCE Continued NOTICE Do not drill holes in the bottom of the drain pan or the underside of the unit Not following this notice could result in damage to the unit or condensate water leaking inappropriately which could cause water damage to surrounding property SLEEVE DRAIN Inspect the sleeve and drain system periodically at least yearly or bi yearly and clean of all obstructions and debris Clean both areas with an antibacterial and antifungal cleaner Rinse
69. rol Board __ ____ _ p IBI 5 LJ LLLI fie 1 d 1 RT5 REMOTE WALL THERMOSTAT WIRING DIAGRAM COOL WITH ELECTRIC HEAT LEGEND 921 600 00 00 LEGEND FOR 5 WIRING HARNESS PART REV R 24VAC Power From Unit Y for Cooling W Call for Heating Reversing valve Energized in heating mode Coll for Low Fon Call for High Fan RT5 Two Speeds Fan T STAT F eld Provided Field Wiring Electronic THERMOSTAT CONNECTIONS Control 77 73 Jumper Wire RTS Board Se EL FETT LL a L LI a SP 2 4 57 58 REMOTE WALL THERMOSTAT WIRING DIAGRAM HEAT PUMP WITH ELECTRIC HEAT PART NO REV 921 600 00 00 LEGEND FOR 5 WIRING HARNESS R 24VAC Power From Unit Y for Cooling Coll for Low Fon Coll for Low Fon Call_ for High Fan RT5 Two Speeds Fan T STAT F eld Provided Field Wiring LEGEND Electronic THERMOSTAT CONNECTIONS Control Board 7773 Jumper Wire RESISTANCE VALUES FOR THERMISTORS ON ELECTRONIC CONTROL BOARD PART 250 700 00 Resistance values are for both return air temperature thermistor and for indoor coil frost thermistor 40 814611 40 35 578819 31 30 41582
70. splay will show an F as acknowledgement of the change Cooling Mode Pressing the Cool button while the unit is in any mode including off will put the unit into cooling mode Adjust the temperature readout to the desired room temperature and the unit will cycle the compressor on and off to maintain a comfortable room The compressor will come on anytime that the room temperature is 1 8 F above the desired temperature The fan operation is dependent on the fan mode selected either continuous or cycling Heating Mode Pressing the Heat button while the unit is in any mode including off will put the unit into heating mode Heat Pump Models PDH When the Heat button is pressed initially the unit will energize the electric resistance heat to quickly bring the room to the set temperature When the desired room temperature falls 1 8 F below the desired set temperature the unit will cycle the compressor on and operate as a heat pump to maintain the room temperature while running more efficiently than resistance heat only models If the room temperature should fall more than 5 F from the set temperature the unit will run the resistance heater The fan operation is dependent on the fan mode selected either continuous or cycling Dip switch 5 controls the fan mode see Dip Switch setting elsewhere in this manual When the outdoor coil temperature falls below 30 F for more than 2 minutes the unit will operate the
71. t Electronic digital type thermostats SHOULD be level for aesthetics Thermostat Location THERMOSTAT SHIELD 13 14 FRIEDRICH DIGITAL CONTROL FEATURES The new Friedrich digital PTAC has state of the art features to improve guest comfort indoor air quality and conserve energy Through the use of specifically designed control software for the PTAC industry Friedrich has accomplished what other Manufacturer s have only attempted a quiet dependable affordable and easy to use PTAC Below is a list of standard features on every Friedrich PTAC and their benefit to the owner Digital Temperature Readout One Touch Operation Individual Mode and Fan Control Buttons Quiet Start Stop Fan Delay Remote Thermostat Operation Wireless Remote Control Ready Internal Diagnostic Program Service Error Code Storage Constant Comfort Room Monitoring Electronic Temperature Limiting Room Freeze Protection Random Compressor Restart Digital Defrost Thermostat By digitally monitoring desired room temperature the room is controlled more precisely than conventional systems The large easy to read LED display can show either set point or actual room temperature as selected by owner When the unit is powered off the unit can be returned directly to heating or cooling mode by pressing the Heat or Cool buttons without the confusing power up sequence of some controls One touch control takes guess
72. t the ohmmeter on the lowest scale R x 1 Touch the leads of the ohmmeter from terminals common to start C to S Next touch the leads of the ohmmeter from terminals common to run to R Add values to 5 and to together and check resistance from start to run terminals 5 to R Resistance 5 to R should equal the total of C to S and to R In a single phase PSC compressor motor the highest value will be from the start to the run connections S to The next highest resistance is from the start to the common connections S to The lowest resistance is from the run to common to R Before replacing a compressor check to be sure it is defective GROUND TEST Use an ohmmeter set on its highest scale Touch one lead to the compressor body clean point of contact as a good connection is a must and the other probe in turn to each compressor terminal If a reading is obtained the compressor is grounded and must be replaced Check the complete electrical system to the compressor and compressor internal electrical system check to be certain that compressor is not out on internal overload Complete evaluation of the system must be made whenever you suspect the compressor is defective If the compressor has been operating for sometime a careful examination must be made to determine why the compressor
73. t delay eliminates multiple units from starting at once following a power outage or initial power up The compressor delay will range from 180 to 240 seconds The new Friedrich PTAC uses a digital thermostat to accurately monitor the outdoor coil conditions to allow the heat pump to run whenever conditions are correct Running the PTAC in heat pump mode save energy and reduces operating costs The digital thermostat allows maximization of heat pump run time FRIEDRICH DIGITAL CONTROL FEATURES CONTINUED Instant Heat Heat Pump Mode Even Heat Monitoring Fan Cycle Control Emergency Heat Override Desk Control Ready Indoor Coil Frost Sensor Ultra Quiet Air System High Efficiency Single Motor Rotary Compressor Auxiliary Fan Ready Aluminum Endplates Seacoast Protection Top Mounted Anti microbial Air Filters Filtered Fresh Air Intake Heat pump models will automatically run the electric heater to quickly bring the room up to temperature when initially energized then return to heat pump mode This ensures that the room is brought up to temperature quickly without the usual delay associated with heat pump units The digital control monitors indoor conditions to ensure that the room temperature is within five degrees of the setpoint If necessary the unit will cycle the electric heat to maintain the temperature This feature ensures guest comfort by delivering the heating benefits of an electric heater while mainta
74. tPumpBTUh 6400 6200 Power Watis Heat 568 550 COP 33 Dehumidificaton 21 SensibleHeatpatio 076 076 075 265 292 239 3 4 2 9 230 208 253 198 3 0 265 292 239 2 7 2 4 230 208 253 198 230 208 253 198 3 3 45 5 3 148 22 2 18 8 26 3 2 15 1 15 gt to w enc 18 68 44 09 28 29 12 lL 6 1 15 1 15 1 15 1 10 1 10 110 325 350 260 280 70 16 42 13 5 16x42x13 5 16x42x13 5 120 138 31 5 250 250 200 325 260 250 200 250 200 Q PHYSICAL DATA Dimensions Net Weight Shipping Weight R 22 Charge 16 x 42x 13 5 112 130 31 16x 42 x 13 5 112 130 31 16 42 13 5 105 123 27 5 16 42 13 5 105 _ ES 21 5 250 Receptacles Fuse Types 5728 PERFORMANCE CERTIFIED CERTIFIED ARI Standard 310 380 ARI Standard 310 380 Packaged Terminal AC Packaged Terminal HP HEATER SIZE www aridirectory org www aridirectory org RECEPTACLE 10 COOL ING amp HEATING PERFORMANCE FOR 2008 MODELS PDE Extended Cooling Performance OUTDOOR DRY BULB TEMP DEGREES F AT 40 R H INDOOR WET BULB TEMP DEGREES F AT 80 F D B _72 67 62 72 67 62 72 67 62 72 67 62 72 67 62 WATTS AMPS Brun 8820 8483 7853
75. te or serious injury METERING DEVICE Capillary Tube Systems All units are equipped with capillary tube metering devices Checking for restricted capillary tubes 1 Connect pressure gauges to unit 2 Start the unit in the cooling mode If after a few minutes of operation the pressures are normal the check valve and the cooling capillary are not restricted CHECK VALVE A unique two way check valve is used on the reverse cycle heat pumps It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle One way Check Valve Heat Pump Models X IJ e gt XE NOTE The slide check inside the valve is made of teflon Should it become necessary to replace the check valve place a wet cloth around the valve to prevent overheating during the brazing operation CHECK VALVE OPERATION In the cooling mode of operation high pressure liquid enters the check valve forcing the slide to close the opposite port liquid line to the indoor coil Refer to refrigerant flow chart This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil In the heating mode of operation high pressure refrigerant enters the check valve from the opposite direction closing the port liquid line to the outdoor coil The flow path of the refrigerant is then through the filter drier and heating capillary to
76. the necessary hardware to communicate to the PDXRC remote control In order to perate the unit with the remote control the remote control sensor must be enabled Simply press and hold the Temp A and buttons simultaneously for 3 seconds and the LED window will display an E for confirmation that the remote is enabled To disable the feature press Temp A and buttons at the same time for 3 seconds LED will display an acknowledgement for 1 second The remote control is now ready for use The temperature mode and fan speed control from the remote control will operate the unite the same as the unit mounted controls NOTE The hand held remote control cannot be used in conjunction with a wall mounted thermostat Remote Control Temperature W Cooler A Warmer Cool Power Heat e Digital Control Diagnostics and Test Mode Diagnostics The Friedrich Smart Center continuously monitors the PTAC unit operation and will store service codes if certain conditions are witnessed In some cases the unit may take action and shut the unit off until conditions are corrected To access the error code menu press the Heat and High Fan buttons simultaneously for three seconds If error codes are present they will be displayed If multiple codes exist you can toggle between messages using the temp up A button To clear all codes press the temp down v button for three seconds while in the error c
77. the system The pilot section of the valve opens and closes ports for the small capillary tubes to the main valve to cause it to shift NOTE System operating pressures must be near normal before valve can shift FROM VALVE DISCHARGE 4 WAY REVERSING VALVE 29 30 TESTING THE COIL A WARNING ELECTRIC SHOCK HAZARD Unplug and or disconnect all electrical power inspections to the unit before performing maintenances or service Failure to do so could result in electric shock serious injury or death The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle Turn off high voltage electrical power to unit Unplug line voltage lead from reversing valve coil Check for electrical continuity through the coil If you do not have continuity replace the coil 4 Check from each lead of coil to the copper liquid line as it leaves the unit or the ground lug There should be no continuity between either of the coil leads and ground if there is coil is grounded and must be replaced 5 If coil tests okay reconnect the electrical leads 6 Make sure coil has been assembled correctly NOTE Do not start unit with solenoid coil removed from valve or do not remove coil after unit is in operation This will cause the coil to burn out CHECKING THE REVERSING VALVE NOTE You must have normal operating pressures before
78. the unit To check for an undercharged system turn the unit on allow the compressor to run long enough to establish working pressures in the system 15 to 20 minutes Reversing Accumulator During the cooling cycle you can listen carefully at the exit of the metering device into the evaporator an intermittent aire hissing and gurgling sound indicates a low refrigerant Compressor Running uieter than Normal charge Intermittent frosting and thawing of the evaporator Amps Lower is another indication of a low charge however frosting and thawing can also be caused by insufficient air over the evaporator Undercharged System Checks for an undercharged system can be made at the compressor If the compressor seems quieter than normal it is an indication of a low refrigerant charge Overcharged Refrigerant Systems of the evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to Compressor amps will be near normal or higher system will usually have higher head pressure depending Noncondensables can also cause these symptoms To upon amount of over charge Suction pressure should be confirm remove some of the charge if conditions improve slightly higher system may be overcharged If conditions don t improve Noncondensables are indicated Whenever an overcharged system is indicated always make sure that the problem is not caused by
79. themselves such as extreme high or low operating conditions or activation of the room freeze protection feature Storing error codes can help properties determine if the unit faced obscure conditions or if an error occurred and corrected itself The on board processor monitors time between demand cycles heat or cool and will cycle the fan every 9 minutes to sample the room condition and determine if the desired conditions are met This allows the room to have similar benefi ts to a remote mounted stat without the complication or cost of a wall mounted thermostat By limiting the operating range the property can save energy by eliminating max cool or max heat situ ations common with older uncontrolled systems The new electronic control allows owners to set operating ranges for both heating and cooling independently of one another When the PTAC senses that the indoor room temperature has fallen to 40 F the unit will cycle on high fan and the electric strip heat to raise the room temperature to 46 F then cycle off again This feature works regardless of the mode selected and can be turned off The control will also store the Room Freeze cycle in the service code memory for retrieval at a later date This feature ensures that unoccupied rooms do not reach freezing levels where damage can occur to plumbing and fixtures Multiple compressors starting at once can often cause electrical overloads and premature unit failure The random restar
80. then stop the unit Attempt to restart the compressor within a couple of seconds and immediately read the voltage on the meter The compressor under these conditions will not start and will usually kick out on overload within a few seconds since the pressures in the system will not have had time to equalize Voltage should be at or above minimum voltage of 197 VAC as specified on the rating plate If less than minimum check for cause of inadequate power supply i e incorrect wire size loose electrical connections etc Amperage L R A Test The running amperage of the compressor is the most impor tant of these readings A running amperage higher than that indicated in the performance data indicates that a problem exists mechanically or electrically Single Phase Running and L R A Test NOTE Consult the specification and performance section for running amperage The L R A can also be found on the rating plate Select the proper amperage scale and clamp the meter probe around the wire to the terminal of the compressor Turn on the unit and read the running amperage on the me ter If the compressor does not start the reading will indicate the locked rotor amperage L R A Overloads The compressor is equipped with an external which senses both motor amperage and winding temperature High motor temperature or amperage heats the overload causing it to open breaking the common circuit within the compressor He
81. through both liquid line and suction line gauge ports While the unit is being evacuated seal all openings on the defective compressor Compressor manufacturers will void warranties on units received not properly sealed Do not distort the manufacturers tube connections A CAUTION FREEZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with liquid refrigerant Failure to follow these procedures could result in minor to moderate injury 10 Recharge the system with the correct amount of refrigerant The proper refrigerant charge will be found on the unit rating plate The use of an accurate measuring device such as a charging cylinder electronic scales or similar device is necessary SPECIAL PROCEDURE IN THE CASE OF MOTOR COMPRESSOR BURNOUT AWARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Failure to do so may result in personal injury or death A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death A WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to fol
82. to compressor motor or overload failure Method Of Charging Repairs The acceptable method for charging the RAC system is the Weighed in Charge Method The weighed in charge method is applicable to all units It is the preferred method to use as itis the most accurate The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair compressor replacement or when there is no refrigerant charge left in the unit To charge by this method requires the following steps 1 Install a piercing valve to remove refrigerant from the sealedsystem Piercing valve must be removed from the system before recharging 2 Recover Refrigerant in accordance with EPA regulations AWARNING BURN HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with a torch adm ssec wenn Failure to follow these procedures could result in moderate or serious injury 3 Install a process tube to sealed system CAUTION FREEZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with liquid refrigerant Failure to follow these procedures could result in minor to moderate injury 4 Make necessary repairs to system 5 Evacuate system to 200 microns or less 6 Weigh in refrigerant with the property quantity of R 22 refrigerant 7 Start unit and verify performance WAR
83. turn on If the outdoor coil temperature sensor drops to 30 F or less for 2 consecutive minutes then the unit will switch to electric heat Thereafter the unit will switch back to heat pump heat if the outdoor coil temperature sensor rises to 45 F or greater Thermostat Connections C Common Ground W Call for Heating Y Call for Cooling R 24V Power from Unit GL Call for Low Fan GH Call for High Fan B Reversing Valve Energized in heating mode PDH Models Only If only terminal is present on thermostat connect to GL for low fan or to GH for high fan operation NOTE It is the installer s responsibility to ensure that all control wiring connectiions are made in accordance with the Friedrich installation instructions Improper connection of the thermostat control wiring and or tampering with the units internal wiring can void the equipment warranty Questions concerning proper connections to the unit should be directed to the factory 210 357 4400 Location The thermostat should not be mounted where it may be affected by drafts discharge air from registers hot or cold or heat radiated from the sun or appliances The thermostat should be located about 5 Ft above the floor in an area of average temperature with good air circulation Close proximity to the return air grille is the best choice Mercury bulb type thermostats MUST be level to control temperature accurately to the desired set poin
84. utes after entering it or by pressing the Cool and Low Fan buttons simultaneously for three seconds Note To access the Test Mode while under remote wall thermostat operation remove thermostat s wires at the terminal block on the electronic control board then connect a jumper wire between GL and GH Defective sensor Defective sensor Defective Sensor 19 Digital Control Diagnostics and Test Mode Continued The chart below lists the possible error codes and their description for Electronic Board Part 250 700 00 idR CODE TRANSLATION ACTION TAKEN BY UNIT POSSIBLE CAUSE An extreme IOW voltage CORON EKISIS Shut down unit Display Error code and flash Once volt DEER lt 198V for 230V units and lt 239V for 265V Defective breaker age rises to normal level system power is restored units Blown fuse 03 Return air thermistor sensor open or short Defective sensor circuit Indoor coil thermistor sensor open or short Defective sensor circuit Defective sensor 4 5 Outdoor coil thermistor sensor open or short HU circuit If O D coil Temperature gt 175 Deg for 2 Alternate flash set point and error code Shut unit consecutive minutes Heat Pump models down for 5 minutes then try again 2 times if fails the only 3rd time then shut down unit Set return air sensor 75 F Alternate flash set point and error code Leave unit running Set ID coil t
85. ystem problems will be more difficult and time consuming if not in some cases entirely impossible The refrigeration system uses four basic principles laws in its operation they are as follows 1 Heat always flows from a warmer body to a cooler body 2 Heat must be added to or removed from a substance before a change in state can occur 3 Flow is always from a higher pressure area to a lower pressure area 4 The temperature at which a liquid or gas changes state is dependent upon the pressure The refrigeration cycle begins at the compressor Starting the compressor creates a low pressure in the suction line which draws refrigerant gas vapor into the compressor The compressor then compresses this refrigerant raising its pressure and its heat intensity temperature The refrigerant leaves the compressor through the discharge Line as a hot High pressure gas vapor The refrigerant enters the condenser coil where it gives up some of its heat The condenser fan moving air across the coil s finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air When a sufficient quantity of heat has been removed from the refrigerant gas vapor the refrigerant will condense i e change to a liquid Once the refrigerant has been condensed changed to a liquid it is cooled even further by the air that continues to flow across the condenser coil The

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