Friedrich SH20J30B-A User's Manual
Contents
1. Incorrect wiring Connect per wiring diagram Cycles on overload Shorted or incorrect capacitor Check by substituting a known good capacitor of correct rating condenser coil Compressor running abnormally Check for kinked discharge line or restricted condenser Check hot amperage Overload opens too soon hange compressor if all other corrections above are normal PROBLEM POSSIBLE CAUSE TO CORRECT Thermostat contacts not closing Check continuity of thermostat at coldest setting Jump contacts if compressor runs replace thermostat ee a replace compressor Open or shorted compressor Check windings for continuity and resistance Direct test windings compressor If direct test fails replace compressor PROBLEM POSSIBLE CAUSE TO CORRECT Thermostat open or inoperative Set to coldest position Test thermostat and replace if Does not cool or Dirty air filter Clean as recommendedi in Owner s Manual cools only Dirty or plugged condenser or Use steam or detergents to clean slightly evaporator coil Poor air circulation in area being Adjust air louvers Low capacity undercharge Clean check for leak and make repair Compressor not pumping Check amperage draw against nameplate If not conclusive properly make pressure test PROBLEM POSSIBLE CAUSE TO CORRECT Defective switch On Off Check continuity across terminals 2 and 3 Fan capacitor open Check by substituting a known good2. 2002 HAZARDGARD ROOM AIR CONDITIONER Models SH14J30B A SH20J30B A Service amp Parts Manual AMERICA S BEST AIR CONDITIONER HG2002 02 02 TABLE OF CONTENTS PAGE AS of lt 1 TOT u u 3 Performance Data ep 3 Component Operation amp Testing iU d Ex RR ARRA RM AL KR LK d 4 NEP AQUA Dd NOU RUF a Fa Addo D d 4 Thermal Overload RR 4 Checking Compressor Efficiency 5 Fan 0 eee ete eee ee ee 5 System Control SWit ossis radica oe E iR ER EE 5 Run Capat O M 6 THermmostlat 6 Low Ambient By Pass VAN ria x ne Eain a aa 8 Sealed Refrigeration System 8 Hermetic Component Replacement rer 9 Special Procedure in the case of Compressor Motor Burn Out 9 Rotary Compressor Special Troubleshooting amp Service 10 Refrigerant Charge RE m E 10 TROUBLESHOOTING Trou
3. Shipping 618 141 01 Pad Shipping Top 600 733 00 Gasket Window Foam Not Shown OPTIONAL ACCESSORIES 01900 235 Drain Condensate Connection Kit DC 2 01900 312 Start Kit Capacitor Relay Pow R Pak HG2001 Parts Manual 7 01 92002403 Installation Manual 19 20 Use Factory Certified Parts Friedrich Air Conditioning Co 4200 North Pan Am Expressway P O Box 1540 San Antonio Texas 78295 1540 USA Tel 210 357 4400 Fax 210 357 4480 HG2002 02 02 Printed in the U S A
4. 2 oz accuracy 9 High Pressure Gauge 0 400 Ibs 10 Low Pressure Gauge 30 150 Ibs 11 Vacuum Gauge 0 1000 microns OUI E mi EQUIPMENT MUST BE CAPABLE OF 1 Recovering 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 the high side of the system 4 Accurately weighing the refrigerant charge actually introduced into the system 5 Facilities for flowing nitrogen through the refrigeration tubing during all brazing processes HERMETIC COMPONENT REPLACEMENT The following procedure applies when replacing components in the sealed refrigeration circuit or repairing refrigerant leaks Compressor condenser evaporator capillary tube refrigerant leaks etc 1 Recover the refrigerant from the system at the process tube located on the high side of the system by installing a line tap on the process tube Apply the gauge from the process tube to EPA approved gauges from the process tube to the EPA approved recovery system Recover the CFC s in the system to at least 596 2 Cut the process tube below the pinch off in the suction side of the compressor Connect the line from the nitrogen tank to the suction process tube 4 Drift dry nitrogen through the system and unsolder the more distant connection first Filter drier high side process tube etc 5 Replace the inoperative component and always insta
5. between the discharge line at the compressor and the suction process tube The valve responds to suction pressure which when reduced in the system causes the valve to open and bypass hot gas from the high pressure side to the low pressure side of the system The hot gas entering the compressor mixes with the cool gas returned through the suction line thus increasing the suction pressure The valve is preset to open when the suction pressure reaches 50 psig This pressure setting cannot be altered The system can be operated at outdoor temperatures as low as 45 F before the evaporator coil will begin to accumulate frost To determine if the valve operates block the return air to the evaporator coil Turn on the unit and touch the tube at the bypass valve outlet which connects to the suction process tube When the low side pressure reaches approximately 50 psig the valve will begin to open and the tube will get hot This method will determine if the valve is responding to the suction pressure change FIGURE 8 LOW AMBIENT Bypass VALVE 608 095 00 SEALED REFRIGERATION SYSTEM REPAIRS EQUIPMENT REQUIRED Voltmeter Ammeter Ohmmeter E P A Approved Refrigerant Recovery System Vacuum Pump capable of 200 microns or less vacuum Acetylene Welder Electronic Halogen Leak Detector 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
6. capacitor is good 5 Repeat steps 3 and 4 to check the fan motor capacitor NOTE A shorted capacitor will indicate a low resistance and the pointer will move more to the 0 end of the scale and remain there as long as the probes are connected An open capacitor will Show no movement of the pointer when placed across the terminals of the capacitor THERMOSTAT A cross ambient thermostat is used to maintain the desired comfort level The thermostat reacts only to a change in temperature at the bulb location Important to the successful operation of the unit is the position FIGURE7 of the sensing bulb in SENSING BULB LOCATION relation to the evaporator See Figure 7 RANGE Thermostat Part No 618 225 02 60 F 2 to 90 F 4 TEST Remove the wires from the thermostat Turn the Note The temperature must be within the thermostat to its coldest position Check to see range listed to check the thermostat Refer to if there is continuity between the two terminals the troubleshooting section in this manual for Turn the thermostat to its warmest position additional information on thermostat testing Check continuity to see if the thermostat contacts open More Follows LOW AMBIENT BY PASS VALVE The HazardGard unit is designed to operate at low outside ambient temperatures This is accomplished by the use of a bypass valve installed in the refrigeration circuit The valve is connected
7. capacitor of the same Fan motor rating does not Inoperative fan motor Direct test fan motor run Incorrect wiring of fan circuit Connect per wiring diagram Relay open Replace Relay Check for seized motor bearings Rotate by hand add oil if noisy replace Bound fan blade or blower wheel Adjust for proper clearance TROUBLESHOOTING Continued PROBLEM POSSIBLE CAUSE TO CORRECT Switch On Off does not cut fan motor off Selector Switch Relay Replace selector switch Replace relay PROBLEM POSSIBLE CAUSE TO CORRECT Poor installation Refer to Installation Instructions for proper installation Noisy and or Fan blade striking chassis Adjust motor mount to attain proper fan blade and blower mounting parts Loose cabinet parts improperly Adjust and tighten as required mounted components tubing rubbing PROBLEM POSSIBLE CAUSE TO CORRECT Evaporator drain pan Clean obstructed drain trough Water leaks into overflowing Condensation forming on Evaporator drain pan broken or cracked Reseal or replace bottom of base pan Water dripping from discharge Dirty evaporator coil or extremely high humidity conditions air grilles Clean coil with steam or detergent PROBLEM POSSIBLE CAUSE TO CORRECT Outside water obstructed leaks Water in center section of base Remove condenser shroud Clean and remove old sealer from Fan blade and slinger ring Adjust fan blade to 1 2 clearance
8. from condenser coil improperly positioned 13 WIRING DIAGRAM FOR SH14J30B A 4 SH20J30B A WIRING DIAGRAM COMPRESSOR CAPACITOR SYSTEM SWITCH TOGGLE COMPRESSOR WIRE HARNESS TO CHASSIS TO CONTROL ASSEMBLY GROUNDING SCREW LEGEND SSR SOLID STATE RELAY CAP CAPACITOR COMPR COMPRESSOR H TERMINAL ADAPTER MIR FAN MOTOR I k GROUND LEAD OVERLOAD PROTECTOR e COMBINATION TERMINAL SYS SW SYSTEM SWITCH IDT INDOOR THERMOSTAT PART NO REV 619 405 XX o i D o o G lt pus G 5 pus G HAZARDGARD PARTS LIST REF PARTNO DESCRIPTION APPLICATION Q N N ONNO 611 935 49 611 935 50 618 714 26 618 714 27 617 682 00 613 892 00 609 353 00 618 297 00 611 088 00 618 225 02 610 805 46 610 805 46 618 298 00 613 891 00 618 213 07 618 208 01 618 501 03 618 500 08 620 504 00 620 504 01 618 751 01 618 753 01 618 744 00 618 744 01 603 081 01 614 939 05 618 205 05 618 205 06 600 713 12 600 713 111 618 293 01 618 299 00 618 120 06 618 120 07 NOT SHOWN ELECTRICAL PARTS Compressor Tecumseh 230 208V 60 Hz 1 Ph Model AWG5515EXN Compressor Tecumseh 230 208 V 60 Hz 1 Ph Model AWG5519EXN Motor Fan 1 8 HP Motor Fan 1 4 HP Box Electrical Wiring Cover Assembly Box Switch On Off DPST Insulator Electrical Relay Solid stat
9. 18 033 00 Inner Wall 618 047 00 Inner Wall 618 025 00 Mount Motor 618 041 00 Mount Motor 618 036 00 618 049 00 Shroud 618 026 00 Brace Shroud 618 169 00 Insulation Inner Wall 618 169 01 Insulation Inner Wall 618 173 00 Blower Front 618 174 00 Blower Front 618 149 00 Scroll 618 175 00 Scroll 618 215 00 Door Slide Assembly 618 034 05 Base Pan 618 034 11 Base Pan 618 038 00 Drain Pan 618 188 00 Rear Grille 618 188 01 Rear Grille 610 289 00 Grommet Compressor 914 004 00 Bolt Compressor Mounting 618 102 00 Plenum Assembly 618 093 00 Knob Fresh Air amp Exhaust s EM 1 EH NOT SHOWN 18 HAZARDGARD PARTS LIST DESCRIPTION APPLICATION CHASSIS PARTS Cont O o cC ON ZO 618 092 00 Lever Fresh Air amp Exhaust 618 062 00 Connector Louver 618 063 00 Louver Grille 618 063 01 Louver with Handle 618 032 03 Outer Shell 618 046 00 Outer Shell 618 089 00 Grille Intake 618 111 00 Grille Intake 618 199 00 Latch Intake Grille 602 944 08 Wingboard 602 944 09 Wingboard 611 050 04 Accessory Package 611 050 05 Accessory Package 611 095 03 Bracket Support 618 197 01 Angle Wingboard Top 618 198 01 Angle Wingboard Side 618 198 03 Angle Wingboard Side 606 103 03 Gasket Vinyl 608 460 16 Bag Assembly Hardware 617 173 01 Gasket Chassis Foam 618 116 20 Carton Shipping 618 116 21 Carton Shipping 618 139 00 Pad Shipping 618 118 00 Pad Shipping 618 118 01 Pad
10. N THE CASE OF COMPRESSOR MOTOR BURNOUT 1 Recover all refrigerant and oil from the system 2 Remove the compressor capillary tube and filter drier from the system 3 Flush the evaporator condenser and all connecting tubing with dry nitrogen or equivalent to remove all contamination from the system Inspect the suction and discharge lines for carbon deposits Remove and clean if necessary 4 Reassemble the system including a new strainer and capillary tube 5 Proceed with processing as outlined under hermetic component replacement ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE Basically troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with only a few exceptions Because of the spinning motion of the rotary the mounts are critical If vibration is present check the mounts carefully The electrical terminals on the rotary are in a different order than the reciprocating compressors The terminal markings are on the cover gasket Use your wiring diagram to insure the correct connections REFRIGERANT CHARGE 1 2 The refrigerant charge is extremely critical Measure the charge carefully and as exactly as possible to the nameplate charge The correct method for charging the rotary is to introduce liquid refrigerant into the high side of the system with the unit off Then start the compressor and enter the balance of the charge gas o
11. bleshooting SH14J30B A qup 11 Troubleshooting SH20J30B A par REELLE ERE 16 WIRING DIAGRAM SH14J30B A SH20J30B A enn nnns sas s 14 PARTS LIST SH14J30B A SH20J30B A Model Chassis Parts 18 SH20J30B A SH20J30B A Model Cabinet Parts List 19 SPECIFICATIONS SH14J30B A SH20J30B A Maximum Temperature Rating 120 C 248 F Ignition Temperature Rating for Class 1 Division 2 Group D PERFORMANCE EVAPORATOR AIR OPERATING ELECTRICAL R 22 COMP DATA TEMP PRESSURES RATINGS REFRIG OIL DISCHARGE SUCTION DISCHARGE AMPS LOCKED CHARGE IN CHARGE IN AIR ROTOR AMPS OUNCES FLUID OZ SH20J30B A 52 83 27 16 SH20J30B A SH14J30B A 56 78 23 22 SH14J30B A Rating Conditions 80 F Room Air Temperature and 59 Relative Humidity with 95 F Outside Air Temperature at 40 Relative Humidity COMPONENT OPERATION AND TESTING WARNING DISCONNECT ELECTRICAL POWER TO THE UNIT BEFORE SERVICING OR TESTING COMPRESSORS Compressors are single phase 208 230 volt All compressor motors are permanent split capacitor type using only a running capacitor across the start and run terminal All compressors are internally spring mounted and externally mounted on rubber isolators Line Voltage Overload The compressor
12. cross Compressor Coil runs Refrigerant leak Check for presence of oil on silver soldered connections continually Check for partially iced coil Check split across coil Check Does not for low running amperage closed PROBLEM POSSIBLE CAUSE TO CORRECT Loss of charge in thermostat bulb Place jumper across thermostat terminals If unit operates Thermostat replace thermostat does not turn Loose or broken parts in Check as above Connect per wiring diagram Test for continuity at switch terminals 2 and 3 PROBLEM POSSIBLE CAUSE TO CORRECT Thermostat set at coldest point Turn to highest temperature setting to see of unit will cycle off Disconnect power to the unit Remove cover of thermostat Thermostat contacts stuck and check if contact is stuck if so replace thermostat Test switch for open contacts at terminals 2 and 3 with switch Switch On Off shorted in Off position Thermostat does not turn unit off 11 TROUBLESHOOTING Continued PROBLEM POSSIBLE CAUSE TO CORRECT Compressor attempts to start Allow a minimum of two 2 minutes to allow pressures to Compressor before system pressures are equalize before attempting to start attempts to equalized Low or fluctuating voltage heck voltage with unit operating Check for other appliances start or runs MEG t A on the circuit Unit should be on separate circuit for proper for short voltage and be fused separately periods only
13. d connection is a must and the other probe in turn to each compressor terminal See Figure 3 If a reading is obtained the compressor is grounded and must be replaced FIGURE 3 TYPICAL GROUND TEST 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 Install a piercing valve on the suction and discharge or liquid process tube Attach gages to the high and low sides of the system Start the system and run a cooling or heating performance test If test shows Below normal high side pressure Above normal low side pressure Low temperature difference across the coil The compressor valves are faulty replace the compressor FAN MOTOR Figure 4 A 230 volt single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan A running capacitor is wired across the start and run terminals of the motor The motor is totally enclosed and is protected with a line voltage overload located internally of the motor The motor shaft is stainless steel to resist corrosion FIGURE 4 FAN MOTOR FAN MOTOR TEST Disconnect power to the unit 1 Determine that the capacitor is serviceable 2 Disconnect the black lead from the circuit board 3 Apply live test cord leads to th
14. e Haz 50 Amp Thermostat Capacitor 20 7 5 MFD 440 Volt Capacitor 25 7 5 MFD 440 Volt Holder Thermostat Coririector Mile itudin i eaea T TA aaia Harness Wire Compressor Harness wire Fan Motor REFRIGERATION SYSTEM COMPONENTS Coil Evaporator Evaporator Condenser Condenser TCapillary Tube 064 I D x 25 Long TCapillary Tube 054 I D x 27 3 8 Long Valve By Pass Valve By Pass Filter Drier Install during sealed system repairs CHASSIS PARTS Knob Control Panel Control Mounting Panel Control Mounting Bushing Snap Bushing Snap Panel Plate Block Insert Panel Assembly left side Panel Assembly left side CAPILLARY LENGTH MAY VARY FLOW RATE IS THE SAME 17 HAZARDGARD PARTS LIST REF PART NO DESCRIPTION APPLICATION CHASSIS PARTS Cont JOQOQCON ZO gt 618 028 02 Partition Control Box 618 043 02 Partition Control Box 618 204 00 Bracket Capacitor Mounting 618 207 01 Strap Capacitor 618 226 01 Decorative Panel 618 306 00 Plate Inner Wall 618 172 00 Cover Top 618 167 00 Insulation Top Cover 618 168 00 Insulation Left Side Deck 618 171 00 608 658 08 Filter Air 608 658 09 Filter Air 618 230 00 Holder Filter 618 202 00 Airfoil 618 206 00 Bracket Resistor Block 915 003 01 Clamp Supply Cord 605 420 03 Fan Blade 605 420 04 Fan Blade 606 106 03 Blower Wheel 606 106 01 Blower Wheel 6
15. e common terminal of the capacitor and the black lead The motor should run at high speed SYSTEM CONTROL SWITCH Figure 5 This switch is double pole single throw Check for continuity between terminals 2 and 3 and 5 and 6 FIGURE 5 SWITCH ON OFF CAPACITOR RUN A run capacitor is wired across the auxiliary and main winding of a single phase permanent split capacitor motor such as the compressor and fan motors A single capacitor can be used for each motor or a dual rated capacitor can be used for both The capacitor s primary function is to reduce the line current while greatly improving the torque characteristics of a motor The capacitor also reduces the line current to the motor by improving the power factor of the load The line side of the capacitor is marked with a red dot and is wired to the line side of the circuit See Figure 6 FIGURE 6 RUN CAPACITOR HOOK UP COMPRESSOR RUN CAPACITOR CAPACITOR TEST 1 Remove the capacitor from the unit 2 Check for visual damage such as bulges cracks or leaks 3 For dual rated capacitors apply an ohmmeter lead to the common C terminal and the other probe to the compressor HERM terminal A satisfactory capacitor will cause a deflection on the pointer then gradually move back to infinity 4 Reverse the leads of the probe and momentarily touch the capacitor terminals The deflection of the pointer should be two that of the first check if the
16. is equipped with an internal line voltage overload This overload is embedded in the windings of the motor to sense the motor temperature The overload will open and disconnect the power to the motor due to high temperatures caused by 1 Alocked rotor 2 Excessive running amps 3 High discharge temperature 4 Low refrigerant charge FIGURE 1 INTERNAL OVERLOAD LINE BREAK INTERNAL OVERLOAD OHMMETER COMPRESSOR WINDING TEST See Figure 2 Remove the compressor terminal box cover and disconnect the wires from the terminals Using an ohmmeter check continuity across the following FIGURE 2 COMPRESSOR WINDING TEST Testing Procedures Terminal C and S no continuity open winding replace compressor Terminal C and R no continuity open winding replace compressor Terminal R and S no continuity open winding replace compressor Terminal C and the shell of the compressor continuity grounded motor replace compressor Should continuity exist between terminals R and S but not between terminals C and S and C and the internal overload may be open the compressor is extremely hot allow it sufficient time to cool It may require as long as one hour for the compressor to cool sufficiently for the internal overload to close GROUND TEST Use an ohmmeter set on its highest scale Touch one lead to the compressor body clean point of contact as a goo
17. ll a new filter drier Drift dry nitrogen through the system when making these connections 6 Pressurize the system to 30 PSIG with proper refrigerant and boost the refrigerant pressure to 150 PSIG with dry nitrogen 7 Leak test the complete system with the electric halogen leak detector correcting any leaks found 8 Reduce the system to zero gauge pressure 9 Connect the vacuum pump to the high side and low side of the system with deep vacuum hoses or copper tubing Do not use regular hoses 10 Evacuate the system to an absolute holding pressure of 200 microns or less NOTE This procedure can be speeded up b the use of heat lamps or by breaking the vacuum with refrigerant or dry nitrogen a 5 000 microns Pressure system to 5 PSI and leave in the system a minimum of 10 minutes Recover refrigerant and proceed with evacuation to a pressure of 200 microns ora minimum of 10 1 Break the vacuum by charging the system from the high side with the correct amount of refrigerant specified This will prevent boiling the oil out of the crankcase NOTE If the entire charge will not enter the high side allow the remainder to enter the low side in small increments while operating the unit 12 Restart the unit several times after allowing pressures to stabilize Pinch off the process tubes cut and solder the ends Remove the pinch off tool and leak check the process tube ends SPECIAL PROCEDURES I
18. nly into the low side The introduction of liquid into the low side without the use of a capillary tube will cause damage to the discharge valve of the rotary compressor All inoperative compressors returned to Friedrich must have all lines properly plugged with the plugs from the replacement compressor TROUBLESHOOTING PROBLEM POSSIBLE CAUSE TO CORRECT Power disconnected Check power source System switch in Off position Set switch correctly Unit does not Branch circuit fuse blown or Replace fuse reset breaker If repeats check fuse or breaker run circuit breaker tripped size Check for shorts in unit wiring and components Inoperative system switch Test for continuity Loose or disconnected wiring at Check wiring and connections Connect per wiring diagram switch Inoperative switch On Off Test for continuity 3 and 2 5 and 6 PROBLEM POSSIBLE CAUSE TO CORRECT Dirty Filter Clean as recommended in Owner s Manual eck for dirty or obstructed coil clean as required Evaporator coil freezes Partially restricted capillary Deice coil Check temperature differential across coil Touch up test coil return bends for same temperature Test for low running current Inoperative fan motor Test and replace if inoperative PROBLEM POSSIBLE CAUSE TO CORRECT Excessive heat load Test cooling performance of unit Unit undersized Check for partially iced coil Check temperature split a
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