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SERVICE MANUAL

1. N CAUTION Use a specified 20 A fuse Do not use wiring copper wire or soldering instead of the fuse The use of non specified fuses can cause machine failure or fire 32 Operation Section 6 2 Wall Mounted Controller WMC Connection This unit is equipped with terminals for connection to the supplied WMC Connection Table Green Wall Mounted Unit Controller Wire No Color Terminal No P Red P C4 White C4 G4 Black G4 Shield Conductor G Ground Screw Unit Terminal Ground Screw Wall Mounted Controller WMC 1003165 NOTE If the wiring needs to be extended a maximum extension wire can be extended up to 316 feet Shield wire 16 22 AWG is recommended for use as an extension wire to reduce noise interference Operation Section 33 6 3 Field Supplied Millivolt Wall Thermostat MWT Connection This unit is equipped with terminals for connection to the MWT The MWT can be installed for convenient access in any room Use with a single or multi stage system wall thermostat Thermostat type Millivolt system Most wall thermostats provide these basic functions Fan Mode On Auto Selects the desired fan mode System Cool Heater Selects Cool only Unit rece
2. Repair Section 51 S Relay Board Warni Self Diagnostic arning Possible Cause al LED Red turns on Signal Detection Contents Code Pattern 1 2 3 4 5 6 Output When an evaporator refrigerant inlet thermistor temperature at or below 26 5 F 3 C is detected during compressor operation However detection is not possible for 5 minutes after the compressor starts DF Freezing abnormality ee OFF Evaporator fan motor When a fan motor reverse IR reverse rotation e rotation signal 760 rpm is abnormality detected lt NOTE gt 1 Shown with the operational status display mode When the fan is under the initial settings or in test mode either the WMC or MWT will be inoperable and no self diagnostic codes will be displayed Alarm buzzer patterns Pattern 1 Pattern 2 Pattern 3 Pattern 4 4 sec 1003173 Repair Section 52 Alarm clear method Self diagnostic codes are not displayed for the MWT To identify the cause check the LED on the relay board and refer to the charts on page 49 to 51 Self Diagnostic Code Alarm Clear Method Possible Cause ERU Sanie Wall Mounted Controller WMC Millivolt Wall Thermostat MWT Mode Mode AL AL Fire alarm input PU PU Pun NENG Press RESET button then Reset the power from the circuit TURPE CETTE press ON OFF button
3. 5 2 Control Box 2 RB Relay Board 9 IND Inductor Coil AL AUS TB1 Terminal Block 1 NF Noise Filter TB2 Terminal Block 2 1LL00284 00 5 3 Relay Board Operation Section 27 The relay board controls components such as the compressor and fan motor based on both signals received from the WMC or MWT as well as signals from various sensors The relay board is equipped with a compressor control device called the STI module The relay board also contains fuses and a DIP switch DIP Switch o o o m E oe DE i x e LED DT ce Beet 1200011 i Ki C irs 1 l B Fuse 2 Je P C Sra e Fuse 3 2 1 12 6 6 6 cua 3 CN102 n 9 O o o o n Fuse 4 Heatsink H q d q STI Module ILL00288 00 1 Fuse Fuse Function Specification F1 Main fuse 20 A 250 VAC F2 Fuse for control circuit 1 A 250 VAC F3 Not in use F4 Fuse for evaporator fan motor 3 15 A 250 VAC Operation Section 28 2 DIP s
4. Piston Cylinder 1003187 Discharge Valve Piston Cylinder 1003188 Operation Section 21 1 Start of compression 1 The oylinder is filled with low pressure gas 2 Since pressure in the discharge chamber is higher than in the cylinder the discharge valve is kept closed 2 Suction and compression 1 The pressure in the cylinder increases gradually 2 Refrigerant suction begins on the suction side of the cylinder 3 The discharge valve remains closed 3 Discharge 1 The pressure in the cylinder exceeds that in the discharge chamber and the discharge valve opens 2 On the suction side refrigerant suction continues 4 Completion of compression 1 When compression is completed all of the refrigerant has been drawn from the suction chamber 2 Operation then returns to step 1 Start of compression and the above process of suction and compression continues repeatedly in succession Operation Section 4 Compressor lubrication The lubrication system is comprised of a hollow shaft an oil scraper mounted at the bottom end of a shaft journal shaft bearing um La Rotor and the lubrication groove for the shaft journal The lubrication groove is wider than the oil orifice When the shaft turns oil is scraped Hollow Shaft Eccentric Shaft upward by the oil scraper along the inside Cylinder diameter of the hollow shaft The oil is fed through the oi
5. 6 Check carefully for gas leaks inside the refrigeration system using the gas leak tester 7 Repair any leak AX WARNING Any repair on a charged system should be perfomed by a licensed professional only AX WARNING Before checking for gas leaks fully confirm that there is nothing flammable in the area to cause an explosion or fire Contact of refrigerant with an open fire generates toxic gas Repair Section 83 5 Evacuation repeat Low Pressure Valve 1 Close the valve of the refrigerant cylinder Then Valve Setting Gauge ER o u remove the charging hose green from the 30 inHg 100 k Pa or larger refrigerant cylinder and connect it to the High Pressure Gauge refrigerant recovery machine High P ressure Valve lt NOTE gt High Pressure K he high pressure valve and the low Dee es eep the high pressure valve and the lo Vacuum Pump in Operation pressure valve of the gauge manifold closed 1002227 2 Using the procedure under Evacuation evacuate the system until the high pressure gauge indicates 30 inHg 100 kPa or larger For 15 minutes or more 3 After evacuation is complete close the high pressure valve of the gauge manifold N CAUTION Make sure to evacuate the system twice or more using the repetitive vacuum method Evacuate the system an additional time on rainy or humid days 84 Repair Section 10 4 Refrigerant Charging Work
6. 9 RUN STOP button Activates or deactivates program s 10 RESET button Clears self diagnostic codes Returns to Day of the week for ON start program setting during program editing mode Clears all program memory during program editing mode by pressing and holding the RESET button for 3 seconds Operation Section 37 LCD Display ra COOL FAN ONLY E gt do MODE Nai iles RUN AUTO FANSPEED ec eege ob E ser n 14 EPFL DIE Ir 15 x III CC 5 1 MON TUE WED THU FRI SAT SUN s T i CVE OI AM OO PM pr 17 A EC H 18 4 CHECK E 19 1003164 11 COOL or FAN ONLY Illuminates to indicate COOL on or FAN ONLY on 12 RUN or AUTO Illuminates to indicate fan mode set to RUN or AUTO 18 Hl or LO Illuminates to indicate fan speed set to High or Low 14 Room temperature Illuminates temperature in either Fahrenheit F or Celsius C 15 Set temperature Illuminates temperature in either Fahrenheit F or Celsius C in COOL mode The temperature range is from 55 F 13 C to 95 F 35 C 16 Day of the week and time Illuminates to indicate day of the week and time 17 Clock symbol Illuminates to indicate program is running 18 Key symbol Illuminates to indicate keypad locked 19 CHECK Illuminates with self diagnostic codes NOTE 1 The room temperature display range is fro
7. Defective CTS3 thermistor Replace the CTS3 thermistor short or open RESET the controller E08 E08 4 WMC lost communication with Check for connection or interference the unit for more than 10 RESET the controller seconds E09 E09 4 Evaporator fan motor is locked Remove any foreign object causing fan lock RESET the controller OL OL 4 Compressor overload protection Repair the leaking section and recharge is activated by refrigerant the correct amount of refrigerant leakage RESET the controller 1 To RESET the controller press RESET button then press ON OFF button Repair Section 57 Self Diagnostic Condition Codes WMC Burza Possible Cause Remedy Pattern Unit does User Service not operate Mode Mode E11 E11 4 Relay board communication Check all the wire connections on the error occurs for 40 seconds relay board RESET the controller If the error still occurs replace the relay board Initialize the fan motor See page 42 E12 E14 4 Excessive current from the STI RESET the controller twice or three module to the compressor times If the error still occurs replace LCD the compressor displays EON E15 4 Compressor lock RESET the controller twice or three self E times If the error still occurs replace diagnostic the compressor codes E16 4 Compressor wires are Reconnect and check the compressor disconnected wires
8. Specifications Terminal Temperature Contact Open 248 F 120 C Contact Close 203 F 95 C 1001691 5 6 Evaporator Fan Motor This unit uses an inverter controlled DC evaporator fan motor The evaporator fan motor is operated by DC motor actuation voltage outputted by the relay board Evaporator fan motor speed is controlled by a relay board built into the fan motor Specifications 1003146 Rated Voltage DC 325 V Rated Output High 240 W Low 104 W Rotational Speed High 935 rpm Low 750 rpm Operation Section 30 5 7 Temperature Thermistor The temperature thermistor detects temperature as a resistance value 1001695 Specification Symbol Denomination Characteristic Detect SHORT Detect OPEN RTS1 WMC room thermistor 8 k ohm at 77 F 25 C 181 F 83 C or higher 29 F 34 C or less E tor air inlet RICO ee ee 5 k ohm at 77 F 25 181 F 83 C or higher 29 F 34 C or less thermistor CTS1 Condenser thermistor 5 k ohm at 77 F 25 C 181 F 83 C or higher 29 F 34 C or less Evaporator inlet pipe cTs2 m PIP 5 k ohm at 77 F 25 C 181 F 83 C or higher 29 F 34 C or less thermistor Evaporator outlet pipe CTS3 Ee PPS 15k ohm at 77 F 25 C 181 F 83 C or higher 29 F 34 C or less thermistor Enteri
9. breaker ul Gg Optional drain pump High pressure signal detected Alarm clears automatically Alarm clears automatically HP HP High pressure protection activated WMC room thermistor RTS1 E01 E01 f failure Evaporator air inlet thermistor E02 E02 RTS2 failure E03 E03 Entering water thermistor EWTS failure E04 E04 fondenserihensior CTS1 Press RESET button then failure press ON OFF button Evaporator pipe inlet thermistor GC EP CTS2 failure Reset the power from the circuit Evaporator pipe outlet Eos E06 E breaker thermistor CTS3 failure E08 E08 WMC communication error E09 E09 Evaporator fan motor locked OL OL Compressor overload E11 E11 STI module communication error E14 Compressor input over current E15 Compressor lock failure Press RESET button turn off E12 Compressor phase interruption the circuit breaker then turn on zu abnormality the circuit breaker and press E17 Motor position detection ON OFF button abnormality Repair Section 53 Self Diagnostic Alarm Clear Method Code ET Possible Cause Peele estes Wall Mounted Controller WMC Millivolt Wall Thermostat MWT Mode Mode E18 STI module input over current E19 Power device temperature abnormality E13 E20 DC voltage abnormality Press RESET Button turri off f the circuit breaker then turn on Reset the power from t
10. 1 Refrigerant charging Valve Setting LO Closed Closed Air Purging 3 M FO pen The Valve of Refrigerant n q Cylinder S e E pA Charging Hose Red Green 95 to Process Tube Fitting 1001901 Valve Setting LO ui Specified Amount Lo HI Closed Open ofRefrigerant Closed Closed High P ressure Valve Valve of Refrigerant Cylinder Process Tube Fitting High Pressure Side Tube 1001903 1 Remove the charging hose green from the vacuum pump and connect it to the refrigerant cylinder R 410A 2 Loosen the nut on the gauge manifold side of the charging hose green Open the valve of the charging hose green Open the valve of the refrigerant cylinder After air purging tighten the nut and close the valve of the refrigerant cylinder 3 Securely place the refrigerant cylinder on a scale with a weighing capacity of 70 Ib 30 kg that is graduated in 0 2 oz 5 g increments 4 Open the high pressure valve of the gauge manifold and the valve of the refrigerant cylinder Charge the system with refrigerant to the specified amount Standard Amount of Refrigerant 2 31 Ib 1 05 kg N CAUTION The amount of refrigerant charged has a great effect on the cooling capacity of the unit Charge to the specified amount always observing the scale graduations while charging 5 Close the high pressure valve of the gauge manifold and the
11. 22 4 4 Electronic Expansion Valve 23 4 5 EVapOotrator cus tnb eee ct Do esce in fur ack atten th toda ws Soe ieee Rc eda 23 dp ACUMULAN ii egeo xc ke ene Yn e Yee e Ye ed ge e e e dee Re RR ene Pee aod 23 47 High Pressure Switch sch opp pts Pee wacked de dau fsUcbumeauqeqr 24 4 8 Water Regulating Valve 24 5 ELECTRICAL SYSTEM 51 Circuit Diagram 2 beue eee ROSE Hiere REO te chy aspe xe RUE Oe URP es 25 5 2 Control BOX oe Deep ke Satan gd tee Taxi Ste delta Sur eire qula Rugs tegebat 26 5 9 Relay Board esu AR ZE eer xe pn pn ERE 27 5 4 Compressor Motor 29 5 5 Compressor Overload Relay 29 5 6 Evaporator FamMot r sus ta as ala ia ede fas bal vege debi any 29 5 7 Temperature Thermistor 0 0 0 0c m mr 30 A RS A eats tea paula ds ree ek Soe f erem OD Ree ree Ee a al tee es 30 Table of Contents 6 CONNECTION AND SETTING 6 1 Power Supply Requirements 0 000 cece hh 31 6 2 Wall Mounted Controller WMC Connection 00 0 cece eee ee 32 6 3 Field Supplied Millivolt Wall Thermostat MWT Connection lille 33 6 4 Warning Signal Connection Output Signal Terminal L and 34 6 5 Fire Alarm Control Panel Connection Input Signal Terminal E and E 35 7 OPERATION 7 1 Wall Mounted Controller WMC mh 36 7 2 Operational Status Display Control Only When Connected With WMC sasasaaaaaasaaa 38 7 3 Self Diagnostic Code Display Operation and Control 39 7 4 Self Diagnos
12. Coil hi Valve Holder YI Stopper 1003162 The evaporator is a heat exchanger covered with plate fins Heat is removed from the air being pulled across the evaporator by the centrifugal fan The resulting cool air is expelled through the cool air vent Accumulator The accumulator is mounted on the suction gas piping between the evaporator and the compressor The accumulator separates the liquid refrigerant from the gas refrigerant allowing only the gas refrigerant to enter the compressor In the accumulator suction gas is led into a cylindrical vessel where the speed of the gas is decreased This process separates the refrigerant contained in the gas by the force from Evaporator to Compressor 1000514 of gravity causing the refrigerant to accumulate at the bottom of the vessel As a result the compressor is protected from possible damage caused by liquid refrigerant intake Operation Section 4 7 High Pressure Switch e The high pressure switch prevents the Pressure of Refrigerant condenser and compressor from being i Snap Disk damaged by excessive high pressure in the Movable Point high pressure line of the refrigeration cycle The switch is normally closed The snap disk Stationary Point responds to the variations in pressure and if Case gAn pressure is abnormally high the snap disk Idi KU Lead Wires moves down to push the pin
13. I ZC area The clearance of the brazed fitting must be minimized to facilitate brazing filler metal to Clearance From The Pipe Fitting and Tubing flow into it by capillary action aes Cleaning brazing filler metal and pipe When the refrigeration system has been opened up exposure to heat may have caused brazing filler metal to stick to the inside and outside of the pipe Brazing filler metal may also be compounded with oxygen in the air to form oxide film Fats and oils may stick to the pipe from handling All these factors can reduce the effectiveness of brazing It is necessary to eliminate excess brazing filler metal using sand paper and by cleaning thoroughly with a solvent such as Trichlene N CAUTION Do not use chlorine cleaner 76 Repair Section 4 Use of dry nitrogen gas During brazing the inside of the pipe undergoes an oxidative reaction due to the brazing flame Introduce dry nitrogen gas 0 27 gal min 1 L min adjust with the flow regulator through the pinch off tube of the refrigerant NOTE Take care not to allow dirt water oil etc to enter into the pipe 5b Vertical joints Heat the whole brazed fitting to a proper brazing temperature Bring the brazing filler Vertical Down J oint Brazing Filler Metal Burner metal into contact with the fitting so that the brazing filler metal starts flowing by itself Stop heating the fit
14. are determined by the WMC settings Fan motor settings AUTO The fan motor turns ON when the compressor is ON and OFF when the compressor is OFF RUN The fan motor continuously operates regardless of whether the compressor is ON or OFF Fan speed settings Hl Fan speed 935 rpm LO Fan speed 750 rpm 2 When the MWT is connected ON OFF control and fan speed are determined by the MWT settings Terminal No Function Relay Contactor G Fan HI OFF OFF ON ON G1 Fan LO OFF ON OFF ON Evaporator fan motor speed OFF HI 935 rpm LO 750 rpm 7 10 Internal Drain Pump Operation The internal drain pump evacuates evaporator condensation accumulated in the drain pan Internal drain pump operation is coupled with compressor operation To allow water in the drain pan to be discharged the internal drain pump turns OFF 2 5 minutes after the compressor turns OFF 1000523 Operation Section 47 7 11 Anti Frost Control Anti frost controls activate in accordance with the evaporator pipe inlet thermistor CTS2 temperature in order to turn the compressor on and off and prevent a decrease in cooling performance resulting from a buildup of frost on the evaporator Compressor off conditions Evaporator pipe inlet thermistor CTS2 temperature lt 27 F 3 C Compressor on recovery conditions CTS2 temperature gt 43 F 6 C 7 12 Fan
15. operate Mode Mode E07 E07 3 Drain hose is clogged Remove any blockage or excessive for optional drain pump kinks preventing air flow RESET the controller Drain hose trap position is too Improve hose installation high to pump up condensation Refer to the installation manual of the water optional drain pump for optional drain pump RESET the controller Optional drain pump is not Reconnect the drain pump and check working the connection RESET the controller If the optional drain pump still does not work replace it HP HP 4 Operating outside of the Check environmental condition Do not LCD displays self diagnostic codes operating temperature range operate the unit outside the operating condition range See page 9 RESET the controller Insufficient water flow Connect water inlet and outlet of the unit and water source correctly RESET the controller Adjust flow of the supplied water source See page 64 RESET the controller Clean water system to remove accumulated sediment See page 64 to 65 RESET the controller Loose high pressure switch connection Reconnect the high pressure switch and check the connection RESET the controller Defective high pressure switch short or open Replace high pressure switch RESET the controller Refrigerant is over charged Charge correct amount of refrigerant See
16. speed rpm 9 35 935 rpm 04 Not in use S 05 Compressor operating current A 15 15 A 06 Evaporator air inlet thermistor RTS2 F C 80 80 F 07 Entering water thermistor EWTS F C 95 95 F 08 Condenser thermistor CTS1 F C 120 120 F 09 Evaporator pipe inlet thermistor CTS2 F C 104 104 F 10 Evaporator pipe outlet thermistor CTS3 F C 40 40 F 11 Self diagnostic code DF IR OR NOTE 1 Display units F C can be changed by pressing and holding the A and V buttons simultaneously for 3 seconds on the WMC Operation Section 39 7 3 Self Diagnostic Code Display Operation and Control 1 When connected with WMC Self diagnostic codes and CHECK are displayed on the LCD display of the WMC Switching the self diagnostic code display mode The self diagnostic code display can be switched between user mode and service mode Press and hold the A and V buttons m a simultaneously for 3 seconds When in the service mode self diagnostic codes flash Self diagnostic code reset While the self diagnostic code is displayed press the RESET button CHECK The self diagnostic code and CHECK Ton displays will turn off and the system will 1003174 switch to standby mode 2 When connected with MWT Self diagnostic codes are indicated by illuminated LEDs on the relay board Self diagnostic codes are reset by opening and then closing the circuit br
17. standby mode TEST Mode 1003179 Operation Section 45 7 7 Compressor Operation 1 Startup speed control The compressor operates at 40 rps for 120 e a Start of seconds after cooling operation begins Once Compressor Tm Operation the refrigeration cycle stabilizes the inverter 8 idus controls compressor speed E YO A40 1 M 1 X Ge a Transition to 5 Normal Control N p o E Time 1003169 NOTE While under startup speed control the unit continues to operate to protect the refrigerant system even if cooling operations are suspended by the WMC or MWT When startup speed control is completed and cooling operation is suspended within 120 seconds the COOL display flashes for the WMC 2 Delay control After the power supply is turned on or after the compressor is stopped compressor startup is delayed for a fixed time period to prevent overloading the compressor Specifications Time Delay 120 sec 7 8 Electronic Expansion Valve Operation The electronic expansion valve automatically controls its valve position to optimize the refrigerant cycle 46 Operation Section 7 9 Evaporator Fan Motor Operation The evaporator fan motor is controlled by signals from the WMC or MWT 1 When the WMC is connected ON OFF control and fan speed
18. t aws Aa 5 k ohm at 77 F 25 C 181 F 83 C or higher 29 F 34 C or less thermistor 5 8 Float Switch A float switch is installed in the drain pan The float switch is a normally closed type switch If evaporator condensation cannot be evacuated and the drain pan becomes full the float rises turning the switch on which then activates the warning signal output and stops the unit s operation This prevents the drain pan from overflowing and alerts the user of the situation 1003151 Operation Section 6 CONNECTION AND SETTING 6 1 Power Supply Requirements This unit requires a single phase 208 230 V 60 Hz power supply to operate The power supply should be a dedicated single outlet circuit with a UL recognized short circuit and ground fault protective breaker with a fuse size of 20 A maximum Securely tighten each terminal The following wire sizes and electrical ratings are recommended Cord Type SJT 3 wires or equivalent Wire Gauge 12 AWG Voltage Rating 300 V minimum Heat Resistance 221 F 105 C Terminal Block R Circuit Breaker with E gt gt Ground F ault Protection i EE aa Oo Fuse 20A Max S S S i GC UP E E Gi Terminal Block of Unit Ground 4 Terminal R T G Power Cord 1LL00285 00
19. the lt gt air filters inspect the plate fins for any dirt dust lint or debris that may have caused SES insufficient cooling performance of the unit If Q cleaning of the fins is necessary it is KK recommended that this service be performed by a qualified service technician Q gegen 2 Examination of operating environment Operating environments can vary depending on location climate and surrounding conditions Installation location can also cause operational problems Consult your reseller concerning operational environment requirements 3 Inspection of cooling capacity performance Measure the difference in temperature 0 between the inlet of the evaporator and the cool air vent If the difference is out of the range given in the graphs on page 10 proceed with the remedy suggested in the troubleshooting chart on page 54 to 59 Cool Air Supply Evaporator Air Intake ILL00280 00 8 5 Inspection of Compressor 1 Compressor motor Measure resistance across the terminals of the compressor motor All terminals must be disconnected from the unit Between terminals at 68 F 20 CH U V Approx 0 64 ohm V W Approx 0 64 ohm W U Approx 0 64 ohm If the measured resistance is not equal to these standard values replace the compressor 2 Overload relay Check for continuity across two terminals of the overload relay At normal temperature there should be continuit
20. 00349 00 13 Take out the four 4 screws 14 Loosen the two 2 bottom screws ILL00350 00 15 Take out the eleven 11 screws and then remove the rear panel Rear Panel 1LL00351 00 Repair Section 70 9 3 Removal of Evaporator Fan Assembly Ring Fan Motor SetScrew Frame 1003127 N CAUTION Initialization is required after replacing the evaporator fan motor See page 42 1 Take out the one 1 screw and the four 4 nuts Evaporator Fan Assembl SE y E ILL00246 00 2 Disconnect the motor connectors white 5 pin and white 4 pin from relay board CN3 CN4 a oe and remove the evaporator fan assembly 1 6 nnann CN3 1LLO0247 00 Set Screw Set Screw 1003130 0 12 in 3 mm 0 12 in 3 mm or more Motor Axis or more 1003131 Motor Stay 1003132 Fan Motor 1003133 Repair Section 71 3 Take out the six 6 screws and then remove the ring Loosen the set screw with an Allen wrench and remove the fan 4 When assembling the fan ensure that the screws align with the motor axis positioning holes N CAUTION Tightening torque 10 0 1 0 ftelbf 14 0 1 4 Nem Verify the clearance between the fan and case ring A
21. 7 L min x103 Btu h 95 35 86 30 77 25 68 20 59 15 Indoor Dry Bulb Temp F C 50 10 Indoor Wet Bulb Temp F C 1LL00358 00 NOTE Cooling capacity listed at water flow rate of 7 1 gal min 27 L min Water flow rate has small effect on cooling capacity Approx 1 effect at the range from 4 0 gal min 15 L min to 10 0 gal min 38 L min x EWT 115 F 46 C c E N e EWT 85 F 29 C EWT 45 F 7 C Power Consumption at 7 1 gal min Indoor Dry Bulb Temp F C 50 59 68 7 10 15 20 25 30 35 Indoor Wet Bulb Temp F C 1LL00359 00 lt NOTE gt Water flow rate is 7 1 gal min 27 L min 4 Current consumption curve 27 L min A EWT 115 F 46 C EWT 85 F 29 C EWT 45 F 7 C nt Consumption at 7 1 gal min Curre Indoor Dry Bulb Temp F C A IL HY V V 50 59 68 10 15 20 25 30 35 Indoor Wet Bulb Temp F C ILL00360 00 lt NOTE gt Water flow rate is 7 1 gal min 27 L min Operation Section 5 Cool air temperature difference curve 25 2 14 21 6 12 12 EWT 45 F 7 C i 18 0 10 8 EWT 85 F 29 C 9 iL 14 4 8 E S E 1086
22. A 6 EWT 115 F 46 C 7 2 4 3 6 2 _ 95 35 9 H 86 30 d E 77 25 2 a 68 20 a S 59 15 Ee E 50 10 Indoor Wet Bulb Temp F C 1LL00361 00 lt NOTE gt Water flow rate is 7 1 gal min 27 L min Operation Section 15 3 CONSTRUCTION 3 1 Exterior Components Cool Air Exhaust 12 0 in Dia Flange Connection For Optional Condensate Pump Fixing Position For Optional Evaporator Room Condensate Pump SS Air Intake 14 0 in Dia Flange Drain Pipe For Pump Mounting Holes Condensate Pan Drain For Gravitational Drain Maintenance AC Fan Motor gi Service Panel i WV Stop Switch Wall Mounted Controller Millivolt System Wire Inlet RR NA CS eL Signal Wire Inlet ARDT Water Outlet 3 4 in NPT Female Water Inlet 3 4 in NPT Female Power Cord Inlet 1LL00275 00 Operation Section 3 2 Internal Structure Accumulator Compressor Electronic Overload Relay Expansion Valve Water Regulating Valve Evaporator AC Fan Motor High Pressure Switch Control Box Evaporator Fan Compressor Evaporator Fan Motor Condenser ILL00276 00 Operation Section 3 3 Basic Construction This unit is compact in construction because of Water Regulating Valve Evaporator Fan Motor the condenser and evaporator being enclosed in one unit The interior of
23. Device 1LL00287 00 T Operation Section OPERATION 7 1 Wall Mounted Controller WMC The WMC for this unit should be mounted within the room close to the return air grill to provide convenient system control LCD Display 6 PROGRAM SET TIME J E NTER Al l RUNISTOP l A A Mme 9 EE MOYNCOOL j Control Panel 4 8 in 120 mm co MJ 8 i BU UU 0 6 in 15 mm 4 1LL00530 00 1 ON OFF button Activates LED illuminates green or deactivates unit operation 2 MODE button Activates COOL or FAN ONLY operation 3 FAN MODE button Activates fan mode RUN or AUTO RUN Fan operates continuously during COOL mode even after the room temperature reaches the set point temperature RUN mode is automatically selected when FAN ONLY mode is selected AUTO Fan automatically stops during COOL mode after the room temperature reaches the set point temperature Fan automatically operates when the room temperature is above the set point temperature 4 FAN SPEED button Activates fan speed High or Low 5 UP A and DOWN V button Increases or decreases the temperature set point during COOL mode Selects each item when setting the clock or program 6 PROGRAM button Sets or displays program 7 SET TIME button Sets clock day and time 8 ENTER button Accepts selection and goes to the next step
24. E The WMC or MWT will be rendered inoperable The initial settings are automatically determined to be satisfactory OK or unsatisfactory NG When unsatisfactory perform initialization again If the settings are unsatisfactory after initializing a second time check the fan motor or relay board Judgment Value Target speed 50 rpm Display OK All relay board LEDs are illuminated NG All relay board LEDs flash N CAUTION Perform initial settings after removing the evaporator inlet and outlet ducts unit external static pressure 0 Pa Performing the initial settings with the ducts in place may result in an unsatisfactory NG determination Operation Section Initialize Fan Motor dE i ym 1003178 44 Operation Section 7 6 TEST Mode Test operation can be performed using the test mode 1 Test operation Set the unit to standby mode make sure the STOP switch on the unit is in the OPERATE position and move the DIP switch 3 1 to the ON position The unit will automatically turn on and operate at the following conditions Compressor speed 80 rps Cool mode Fan mode RUN Fan speed HI NOTE The WMC or MWT will be inoperable during the test operation 2 Quit test operation Turn DIP switch 3 1 OFF The unit operation will stop and the system will shift to
25. E07 Obtional draln pump 3 ee switch is OFF continuously IP PUT for 60 seconds When high pressure switch is OFF activated 2 times in 24 hours High pressure signal from first detection oe T detected When high pressure switch is activated 3 7 times in 24 hours from first detection High pressure 4 AS When high pressure switch is protection activated activated 8 times in 24 hours WMC room thermistor E01 E01 ee e RTS1 failure E02 E02 Ge air inlet e thermistor RTS2 failure Entering water E03 E03 thermistor EWTS e o ON oer failure 2 When an abnormality is detected E04 E04 Condenser thermistor CTS1 failure Evaporator pipe inlet E05 E05 pl AA e e thermistor CTS2 failure E06 E06 evaporator pipe Suet a thermistor CTS3 failure When a communication error E08 E08 WMC communication 4 between the relay board and error WMC continues for at least 10 seconds 50 Repair Section Self Diagnostic Relay Board Code ATTI LED Red turns on Warning Possible Cause P Signal Detection Contents User Service attern Output 2E ESSEN RS E Mode Mode When a fan motor speed of Evaporator fan motor 50 rpm or less is detected E09 E09 e ee locked four times within 10 seconds after the fan motor is started When compressor overload OL OL Compressor overload Giele f P relay is activa
26. Motor Reverse Rotation Protection When the motor rotates in reverse due to an external force electricity is generated inside the motor If the fan motor is operated while the electricity is being generated the relay board built into the fan motor will be damaged To prevent damage to the relay board the unit automatically turns OFF when the evaporator fan motor rotates in reverse at speed 760 rpm or above The unit automatically turns back on when the evaporator fan motor rotates in reverse at speed less than 760 rpm 7 13 Automatic Restart After Power Interruption Automatic Recovery Function The program within the microprocessor of the unit contains a feature that will automatically restart the unit after power is lost and then regained The unit also has memory in order to return itself back to the operating mode either manual or preset program it was in prior to the loss of power Any preset program will also be retained in the memory in the event power loss occurs Repair Section 8 TROUBLESHOOTING 8 1 Troubleshooting Before troubleshooting the system the following inspection should be performed AN WARNING e Do not touch the relay board until 15 minutes after the power supply LED 7 green is turned OFF Failing to follow the aforementioned caution may lead to electrical shock Specifically in regards to capacitors mounted on the relay board electricity may still be stored in components even after the po
27. Reconnect and check the relay board wires RESET the controller E17 4 Excessive compressor load RESET the controller twice or three Excessive compressor times If the error still occurs replace startup differential pressure the compressor 1 To RESET the controller press RESET button then press ON OFF button 58 Repair Section Self Diagnostic Condition Codes WMC E Possible Cause Remedy Unit does User Service not operate Mode Mode E13 E18 4 Excessive current from the RESET the controller twice or three power source to the STI times If the error still occurs replace module the compressor E19 4 Degraded heat sink Replace the relay board performance Then initialize the fan motor See page 42 AC fan motor is not working Reconnect the AC fan motor and check the connection RESET the controller If the AC fan motor still does not work replace it RESET the controller LCD E20 4 Recovery from momentary Check if the supplied voltage to the unit displays power loss or momentary is unstable due to the external influence SH voltage drop or not diagnose Momentary power loss or RESET the controllers SA momentary voltage drop If the error still occurs replace the relay board Then initialize the fan motor See page 42 E21 4 Sensor on the relay board is Replace the relay board short or open Then initialize the fan motor See page 42 E22 4 Compress
28. SERVICE MANUAL CMW30 SERIAL NUMBER FROM APRIL 2011 0411 TO PRESENT MOVINCOOL THE 1 SPOT COOLING SOLUTION DoclD 00G00085E 2011 DENSO SALES CALIFORNIA INC All rights reserved This book may not be reproduced or copied in whole or in part without the written permission of the publisher DENSO SALES CALIFORNIA INC reserves the right to make changes without prior notice MovinCool amp Office Pro and SpotCool are registered trademarks of DENSO Corporation Table of Contents Table of Contents Operation Section 1 PRECAUTIONS FOR SAFETY 1 1 Foreword EE EEN 6 1 2 Definition of Terms eto Ca dt a eu ade bine bane AE ai ME i EE 6 T3 General Preca tions ive REIR ex DL tI OE RESCUE EE pue qs 6 2 SPECIFICATIONS 2 1 Exterior Dimension Diagram eiiru seenen r aa a e hne 7 2 2 Technical Specifications liiis hh 8 2 9 E Let De 10 3 CONSTRUCTION 3 1 Exterior Components 0 0 00 err 15 39 2 dnteralSt ct tre is hee e sot eem e Rt dede nre gc roe tec cr Cere rs Rien ede o hg 16 3 8 Basic Construction s seras as aeaaeai eia e aas 17 3 4 Air FOW rue ede A Y a a oa E ah eg A a A eee 17 30 Water FOW rar ida A a ts E 17 4 REFRIGERATION AND WATER SYSTEM 4 1 Refrigeration and Water System Construction 18 4 2 COMPE coiere tr xor d vo pet ura emu f o rU PLANE D LE eh 20 43 5 Gonde nser vos nies ya ood Rp Ee ee De pads Past A orcs Gadde Sia bed Garde Mob ES
29. STEM REPAIR 10 1 Repair of Refrigeration and Water System llli es 75 10 2 Removal of Refrigeration and Water System Components 20 00 cee eee eee 77 10 3 Charging the System with R 410A Refrigerant llis 79 10 4 Refrigerant Charging Work 84 11 REASSEMBLY 11 4 Reassembly of Un 86 11 2 Compressor Mounting 86 11 8 Evaporator Fan Assembly 86 11 4 Wiring Nolita s 5 Aor eedem pem Ue Dd ae Red Te epi us edes 86 11 5 Perrorm the Inspection c oeste poma harto Bde bnukqberrevevvbe pie ei8eehesq unit eh 86 6 Operation Section 1 PRECAUTIONS FOR SAFETY 1 1 Foreword e This manual has been published to service the MovinCool CMW30 Use this manual only when servicing this unit 1 2 Definition of Terms N WARNING Describes precautions that should be observed in order to prevent injury to the user during installation or unit operation A CAUTION Describes precautions that should be observed in order to prevent damage to the unit or its components which may occur during installation or unit operation if sufficient care is not taken NOTE Provides additional information that facilitates installation or unit operation 1 3 General Precautions AX WARNING All electrical work should only be performed by a qualified electrical technician Repair to electrical components by non certified technicians may result in personal injury and or damage to the unit All elec
30. Temp F C 1003204 Refer to the wiring diagrams on page 25 and check the connection of each wire N CAUTION Secure the wires using clamps to prevent contact with the edges of the structure etc Secure the wires in the same position as prior to removal Repair Section 63 8 9 Inspection of Refrigeration System In most cases the cause for insufficient cooling is a clog in the system a leakage or an incorrect amount of refrigerant In such cases inspect the system according to the following procedure 1 Clogged refrigeration system Check the component parts of the refrigeration system including piping that could be clogged with refrigerant If clogged with refrigerant only the clogged part is partially frosted If this occurs change the part in question 2 Refrigerant leak Carefully check all connections and each component for leaks whenever the refrigeration system is installed or repaired Use an electronic gas leak tester to inspect the system See page 75 to 85 3 Insufficient refrigerant When the unit is not producing sufficient cooling follow the troubleshooting chart on page 59 to confirm the cause of the problem Then charge the system with the refrigerant to the specified amount as indicated on page 84 64 Repair Section 8 10 Inspection of Water System 1 2 3 In most cases the cause for insufficient cooling is a clog in the system a leakage or an i
31. an 1LL00240 00 9 2 Disassembly Service Panel Bottom Screw 1 ILL00241 00 Terminal o Ground Line PA o e M O Power Supply Line 7 1003182 Top Panel Screws 6 Screws 5 Top Panel ILL00242 00 Repair Section 67 1 Loosen the bottom screw 2 Take out the nine 9 screws and then remove the service panel 3 Disconnect the two 2 power supply lines from the terminal and disconnect the ground line N CAUTION Ground tightening torque 1 0 0 15 ftelbf 1 3 0 2 Nem 4 Take out the twenty one 21 screws and then remove the top panel Repair Section 68 Connector Bottom Screw 1 Screws 12 ILL00244 00 LL00245 00 Screws 3 AQ 1003126 5 Take out the two 2 screws and then remove the panel 6 Disconnect the connector 7 Loosen the bottom screw 8 Take out the fifteen 15 screws and then remove the front panel 9 Disconnect the two 2 connectors and disconnect the ground line 10 Take off the three 3 screws and one 1 bolt and remove the drain pump assembly Repair Section 69 11 Take out the four 4 screws and then remove the AC fan motor 1LL00348 00 12 Disconnect the two 2 connectors from the AC fan motor Connectors 2 ILL
32. cs Voltage Requirement Single Phase 208 230 V 60 Hz Operating Voltage Max 253V Range Min 198 V Starting Current 11 5 A Recommended Fuse Size 20A FLA 9 6 8 9 A MCA 13 5 A MOP 23A LRA 20 6A Cooling Capacity and Power Consumption Air 80 F 27 C 50 RH Water EWT LWT 85 F 95 F 29 C 35 CH Total Cooling Capacity 29400 29400 Btu h 8640 8640 W Sensible Cooling Capacity 20400 20800 Btu h 6000 6120 W Power Consumption 1 93 1 99 kW Current Consumption 9 6 8 9 A Power Factor 97 97 Air 75 F 24 C 50 RH Water EWT LWT 86 F 95 F 30 C 35 CH Total Cooling Capacity 25200 25200 Btu h 7380 7380 W Sensible Cooling Capacity 21400 22000 Btu h 6300 6420 W Power Consumption 1 95 2 00 kW Current Consumption 9 6 9 0 A Power Factor 98 97 IEER 17 0 Compressor Type of Compressor Hermetic Swing Inverter Output Variable Evaporator Type of Evaporator Plate Fin Type of Fan Centrifugal Fan Air Flow High 1000 1060 CFM 1700 1800 m3 h Low 770 840 CFM 1300 1430 m3 h Max External Static Pressure 0 66 IWG 165 Pa Motor Output High 180 240 W Low 84 104 W Condenser Type of Condenser Water Cooled Coaxial Coil Water Flow Rate 7 1 gal min 27 L min Type of Water Control Refrigerant Discharge Pressure Operation Section 9 ITEM SPECIFICATIONS Ref
33. down causing the Molding by Resin SOINS Terminal internal contacts to open This interrupts the ground signal at the relay board which turns the compressor off 4 8 Water Regulating Valve This unit is equipped with a water regulating valve to operate within wide water temperature range This water regulating valve automatically controls the water flow rate to stabilize the refrigeration system ILL00282 00 Operation Section 25 5 ELECTRICAL SYSTEM 5 1 Circuit Diagram WMC romeo do 0 CONTROL op CONTROL a RTS2 CTS3 CTS2 CTS1 EWTS 2771 a RTS1 CN e e Lee mu ed soi M LU 4 EXV Fire o n HPRS OLC FLTS sw Alarm Output OE SO G input Signa ermosta Sy y 5 eooe p c4G4 rett CY1Y2G 61 DO Je 5 ORe e 0000 0000 oo
34. e order using the V button ILLO0531 00 Display No Display code Function Ot Total unit power on time unit h Ct Compressor operating time unit h 1 Self diagnostic code display Self diagnostic code record 1 2 Self diagnostic code display Self diagnostic code record 2 3 Self diagnostic code display Self diagnostic code record 3 4 Self diagnostic code display Self diagnostic code record 4 NOTE If there are no self diagnostic codes will be displayed Operation Section 41 2 Exiting the self diagnostic code records display To exit the self diagnostic code records display press the RESET button or do not operate the system for 1 minute 42 Operation Section 7 5 Initialize Fan Motor nitialize the motor to correct the motor speed when any of the following components are replaced evaporator fan motor relay board 1 Operation method 1 With the power supply OFF turn DIP switch 2 1 ON 2 Turn the power supply ON 3 Turn DIP switch 3 1 ON The evaporator fan motor will stop after operating for approximately one minute The LEDs on the relay board will illuminate in order while the fan motors are operating After the settings are complete the fan motors will automatically stop and all the LEDs on the relay board will illuminate 2 Quit 4 Turn DIP switch 2 1 OFF 5 Turn DIP switch 3 1 OFF 6 The system will switch to standby mode NOT
35. eaker LED 2 prr Relay Board 1003175 40 Operation Section 7 4 Self Diagnostic Code Records Display Operation Only When Connected With WMC The unit power on time compressor operation time and self diagnostic codes can be displayed on the WMC when it is connected to the unit The unit power on time and compressor operating time can be stored up to 65535 hours automatically cleared to O hour and start counting The self diagnostic codes can be stored up to 4 different codes 1 Display method To display the unit power on time compressor operation time and self diagnostic codes set the unit to standby mode then press and hold the RESET button for 3 seconds Unit power on time Ot is a default view Press A button to view the compressor operating time Ct or press V button to view the self diagnostic code display number 4 The view sequences are shown in the figure below Ot Total Unit Power On Time Ct Compressor Operating Time Self Diagnostic Code Display 1 Displayed Code rir 11 777 d including Self Diagnostic Code Display 2 fo een Unit Power On Time Compressor Operation Time e e Self Diagnostic Code Display 3 Di Self diagnostic Code met Gage em Self Diagnostic Code Display 4 Display Number oot 1234 Displayed in revers
36. en replacing the compressor attach the pipe 1 and the pipe 2 packaged in the compressor assembly Repair Section 78 1 Removal of water cooled condenser 1 Disconnect four brazing points A D as shown When brazing cover the area E with a wet cloth to prevent damage 2 Remove two 2 nuts from the frame Then oM i remove the water cooled condenser ILL00353 00 2 Removal of water regulating valve 1 Remove one 1 nut and two 2 screws Then disconnect one brazing point A When brazing cover the area B with a wet cloth to prevent damage Screws 2 ILL00354 00 10 3 Charging the System with R 410A Refrigerant Repair Section 79 Always ensure that the refrigeration system has been properly evacuated before charging with the specified amount of R 410A Equipment is for R 410A only Liquid charge no gas charge Make sure not to use more than 90 of the initial weight of R 410A in the cylinder AX WARNING When handling refrigerant R 410A the following precautions should always be observed Always wear proper eye protection while handling refrigerant Maintain the temperature of the refrigerant container below 104 F 40 C Perform repairs in a properly ventilated area Never in an enclosed environment Do not expose refrigerant to an open flame Never smoke while performing repairs especially w
37. etting is incorrect Correct DIP switch setting 5 Stop switch Stop switch is in the STOP position Turn the stop switch to OPERATE Self diagnostic codes are not displayed for the MWT To identify the cause check the LED on the relay board and refer to the charts on page 49 to 51 To clear LED on the relay board for the MWT reset the power from the circuit breaker Self Diagnostic Condition Codes WMC SE Possible Cause Remedy Pattern Unit does User Service not operate Mode Mode AL AL 1 Signal is input from the fire Check the fire alarm system and alarm confirm there is no signal input to the unit then RESET the controller PU PU 3 Drain hose clogged Remove any blockage or excessive for internal drain pump kinks preventing water flow LCD RESET the controller displays Drain hose trap position is too Improve hose installation self high to pump up condensation Refer to the operation manual of this diagnostic water unit codes for internal drain pump RESET the controller Internal drain pump is not Reconnect the internal drain pump and working check connection RESET the controller If the internal drain pump still does not work replace it 1 To RESET the controller press RESET button then press ON OFF button Repair Section 55 Self Diagnostic Condition Codes WMC E Possible Cause Remedy Unit does User Service not
38. for abnormal noise or abnormal vibration DENSO DENSO SALES CALIFORNIA INC Long Beach CA 90810 www movincool com First Issue April 2011
39. fter installing the fan and fan motor ensure that the clearance between the fan and case ring is at least 0 12 inch 3 mm 5 Take out the four 4 nuts and then remove the motor stay 6 Take out the four 4 bolts and then remove the fan motor N CAUTION When assembling the motor ensure that the wire connection ends are facing down 72 Repair Section 9 4 Removal of Electrical Components Relay Board and Bracket Assembly e Inductor Coil Terminal Block 2 Ground Bolt ILL00248 00 Repair Section 73 1 Relay board to Wall Mounted to Compressor to Millivolt Controller Overlord Relay Thermostat to Evaporator Pipe Inlet Thermistor and Evaporator Outlet to Stop to Evaporator Thermistor Switch Air Inlet Thermistor to Float Switch to High Pressure Switch to Electronic Expansion Valve DIP Switch to Condenser to Internal Thermistor Drain Pump Motor and AC Fan Motor RAU N z to Outdoor to Output Signal Thermistor to Evaporator Fan Motor gt HP Le T to Evaporator ER Fan Motor Ground Connection to Inductor Coil to Noise Filter to Compressor Ground Line ILL00249 00 AX WARNING e Do not touch the relay board until 15 minutes after the power supply LED 7 green is turned OFF Failing to follow the aforementioned warning may lead to electrical shock Specifically in regards to capacitors mounted o
40. he circuit E21 Powel Gevice damage the circuit breaker and press breaker SE ON OFF button E22 Circuit malfunction E23 E23 ESPERTO fan motor over rotation abnormality Self Diagnostic Possible Cause Alarm Clear Method Code Wall Mounted Controller WMC Millivolt Wall Thermostat MWT DF Freezing abnormality IR Evaporator fan motor reverse rotation abnormality Alarm clears automatically Alarm clears automatically OR Condenser fan motor reverse rotation abnormality NOTE 1 Shown with the operational status display mode When the fan is under the initial settings or in test mode either the WMC or MWT will be inoperable and no self diagnostic codes will be displayed Verify self diagnostic codes using the LED on the relay board 54 Repair Section 8 3 Troubleshooting Chart To accurately troubleshoot the problem it is important to carefully confirm the nature of the problem Condition Unit does Check Area Possible Cause Remedy not operate 1 Voltage Power failure Repair power supply Turn the circuit breaker on 2 Ground fault breaker trip Ground fault or defective ground Repair ground fault section LCD display fault Reset or repair circuit breaker turns off 3 Fuse Fuse is blown Replace fuse on the relay board 4 WMC MWT Incorrect connection Connect the wires correctly DIP switch s
41. hen handling refrigerant Take caution so that the liquid refrigerant does not come in contact with the skin If liquid refrigerant strikes eye or skin Do not rub the eye or the skin Splash large quantities of cool water on the eye or the skin Apply clean petroleum jelly to the skin Go immediately to a physician or to a hospital for professional treatment G When leak is found repair the connection or components Step 1 Connect manifold gauge 1 Evacuate the system 15 minutes or more Step 2 e 30 inHg 100 kPa or more of vacuum 2 Stop evacuating the system Leave for 5 minutes 3 Check the vacuum Step 3 Connect to refrigerant source Step 4 Test the system for leaks Charge the system with R 410A Step 5 See Technical Specifications for the specified amount Step 6 Remove manifold gauge ILLO0084 00 Repair Section 1 Connection of gauge manifold Charging Hose Side Refrigerant Cycle Side Pinch Off Tube 1002183 Low Pressure Valve Closed High Pressure Valve Closed Green Hose Red Hose Process Tube Fitting High P ressure d Side Tube When Stopped 1000568 2 Evacuation Valve Setting LO HI jl LO HI Ga uge Closed Open Closed Closed 30 inHg 100 k Pa or larger Low Pressure Valve High P ressure Gauge High P ress
42. ing As a result the room is controlled with a much smaller temperature swing than traditional control methods 1 Compressor construction 2 The construction of a swing type compressor is divided into two mechanisms the drive mechanism compressor motor and the compression mechanism compressor When the rotor shaft of the motor drive mechanism turns the piston compression mechanism rotates to compress the refrigerant ILLOO281 00 Basic compressor operation The piston compression mechanism is set eccentrically with a certain distance given from Swing Bush Discharge Valve the axis of the center of the cylinder The piston turns to compress the refrigerant in the space ies rice between the cylinder and eccentrically mounted piston A swing bush absorbs the S haft lateral blade movement under piston action Piston Cylinder The blade partitions the space between the nested suction side and the discharge side to keep compressed refrigerant from returning to the suction side There is no suction valve The discharge valve is designed not to open until the pressure of the refrigerant within the cylinder reaches or exceeds discharge side pressure As a result the discharge valve prevents the backward flow of refrigerant gas 3 Operation Discharge Valve Piston Cylinder 1003185 Discharge Valve Piston Cylinder 1003186 Discharge
43. ives signals from the MWT to perform the following operations Multi Stage System Single Stage System Terminal No Function Terminal No Function RC Common RC Common Y1 Cool MIN Y Y2 Cool Y2 Cool MAX G Fan HI G Fan HI G1 Fan LO Gl Fan LO Unit Terminal Unit Terminal i nrn nyn ynne i 1 1 1 1 1 1 1 Ground Screw Wall Thermostat Wall Thermostat Multi Stage System Single Stage System 1003166 lt NOTE gt Terminal No G1 is used only with the MWT that has Fan Hi Lo speed control Use the recommended extension wire size from 16 AWG to 26 AWG for a solid wire 34 Operation Section 6 4 Warning Signal Connection Output Signal Terminal L and L The unit is equipped with a warning signal output relay type Form C normal open dry contact that can be used to monitor the failure condition The relay contactor is closed when the self diagnostic codes are displayed on the WMC and indicated by LED on the relay board The relay output contactor is rated for 5 A at DC 30 V or 5 A at AC 250 V resistive load and is compatible with various warning de
44. l orifice by centrifugal force then supplied to the lubrication groove for each shaft journal lubricating the bearing In this lubrication system oil enters into each bearing Oil Feed Groove separately and returns to the oil reservoir This Oil Orifice Oil Scraper system effectively prevents bearing temperature increases and offers high reliability In addition the specially treated shaft journal keeps the bearing from being damaged during high temperature operation 4 3 Condenser The condenser is a heat exchanger with coaxial tubes The inner tube is a copper tube in which the water flows The outer tube is a steel tube The refrigerant flows between inner tube and outer tube Heat is given off and absorbed by the water being passed through the condenser and then expelled through the water outlet 4 4 4 5 4 6 Electronic Expansion Valve The electronic expansion valve causes rapid high temperature high pressure liquid refrigerant refrigerant expansion by injecting from the condenser through a small orifice The resultant low temperature low pressure mist refrigerant is then sent to the evaporator A solenoid valve adjusts the refrigerant quantity according to the evaporator air inlet and air outlet thermistors such that the mist refrigerant can undergo heat exchange in the evaporator under optimal conditions Evaporator Operation Section 23 Refrigerant Flow Control
45. m 16 F 9 C to 140 F 60 C When the display value is greater than 99 F it displays values of OOF for 100 F O1F for 101 F and O9F for 109 F When the wall mounted controller of other model is connected the lowest set point temperature is 60 F 16 C The model name label is attached on the wall mounted controller s back cover When power source is supplied to the unit the wall mounted controller is in standby mode During standby mode the controller panel displays time 38 Operation Section 7 2 Operational Status Display Control Only When Connected With WMC The operational status of each functional part can be displayed while the unit is running 1 Display method Press and hold the A V and FAN MODE buttons simultaneously for 3 seconds The display items can be switched using the A or V buttons 2 Exiting operational status display To exit the operational status display press the RESET button or do not operate the system for 1 minute LCD Display LED Color Green COOL FAN MODE FAN SPEED Displayed Code ENTER RUN STOP REs ET MOVINCOOL Status Display Control Panel 1LL00331 00 ouis Display Item Geen Display Example Code Units 01 Compressor speed rps 80 80 rps 02 Electronic expansion valve position pulse 3 50 350 pulse 03 ID motor
46. n the relay board electricity may still be stored in components even after the power supply has been OFF for 15 minutes Disconnection 1 Disconnect the power at the source 2 Loosen the bottom screw See page 67 3 Take out the nine 9 screws and then remove the service panel See page 67 4 Disconnect all connectors from the relay board 15 connectors 7 connections on the relay Refer to the figure Relay board to identify the relay connections and the connectors marked as CN To ensure easy reinstallation be sure to label each connector wire as you remove them 74 Repair Section 5 Take out the six 6 screws and remove the relay board The ground line for the relay board is tightened together with the bottom right screw As shown in the illustration above the relay board and bracket assembly are replaced as a set Re connection 1 Attach the relay board with the six 6 screws Always tighten the ground line for the relay board together with the bottom right screw Make sure that the DIP switches on the new relay board are all set to the off position 2 Reconnect all 22 connectors to the new relay board Refer to the figure Relay Board to identify the connectors that need to be connected 3 Reconnect the power at the source and turn on the unit to verify the function and operation of the unit Turn off the unit The initial setting for motor speed must be done if the relay board is replaced When using
47. ncorrect amount of water in the system In such cases inspect the system according to the following procedure Insufficient water flow Sufficient water flow is required while the unit is operating Insufficient water flow can activate the high pressure switch causing the unit to stop The recommended supplied water source should have a minimum flow rate of 5 3 gal min 20 L min at 6 psi 40 kPa or higher Insufficient water flow can be estimated by measuring the leaving water temperature LWT During normal operation the LWT should be less than or equal to 130 F 54 C The unit s maximum LWT is 150 F 66 C If the LWT is higher than the maximum value adjust the supplied water source to meet the recommended minimum flow rate or higher Clogged water system In case a self diagnostic code HP is displayed there are two possible causes related to clogged water system Condensing capacity is reduced by accumulated sediment Water line is clogged with accumulated sediment Clean inside of the water system to remove accumulated sediment For details see below Cleaning inside of the water system The water regulating valve in the water system can be manually flushed to clear any sediment accumulated inside of the water system Water Water 1 Turn off the unit and disconnect power Shut off Supply Return the water supply and disconnect the drain plugs to drain the water from the drain ports Then disconnec
48. o 000000000 TB2 TIEN inailll 2 122 l4 11 ll 52 14 1 G0 OOOO OOOO r ee OO eeee Iesel OOOOD OO OOO CN17 CN20 CN19 CNS oe On CN8 CN9 CNI0 CN11 CN14 1 4 ze 0 L__ CN18 DIP SWITCH J n i rower Citat rg i o i RB str F3 STI o T o o Module BB oa F1 F2 ape loo CN CN CN CN CN CN CN CNL w 1 107 106 105 104 103 101 102 l E _ See Se E S ae ke NF E S d Tre z e e f R lo L AC 208 230V G 1 PHASE 60 Hz E DSW1 DSW3 DIP SWITCH 1 ON ENABLES MILLIVOLT WALL THERMOSTAT MWT 41 0N TEST MODE Dout DSW2 DSW3 DSW4 OFF ENABLES WALL MOUNTED CONTROLLER WMC 42 44 N A a o zm 5 2 N A DSWA N A orr perau gt EEEE RRHH EHE E DSW2 L A Wa 1 ON INITIALIZES FAN MOTOR 2 12 1234 1234 Son ICH Terminal Block 1 HPRS High P ressure S witch TB2 Terminal Block 2 RS F loat Switch MC Compressor Motor WMC Wall Mounted Controller OLC Compressor Overload Relay RB Relay Board MF1 Evaporator Fan Motor Ei Fuse 1 MF2 AC Fan Motor HS Fuse 3 For Evaporator Fan Motor MF3 AC Fan Motor Ruse WMC Room Thermistor MDP Drain Pump Motor RTS2 Evaporator Air Inlet Thermistor EXV Electronic Expansion Valve EWTS Entering Water Thermistor NF Noise Filter CWS Condenser Thermistor IND Inductor Coil 52 E vaporator Pipe Inlet Thermistor SW Stop S witch leg Evaporator Pipe Outlet Thermistor CN Connector For Option Drain Pump G Ground 1LL00283 00 Operation Section
49. ol Included Programmable Timer Included Two Speed Fan Included Inverter Compressor Included Specifications are subject to change without notice lt NOTE gt 1 With two 20 feet 6 1 m ducts containing one 90 bend each supply grill and return grill with filter 0 30 IWG 75 Pa external static pressure on high fan speed 2 Confirm pressure drop of duct grills and filter with manufacture s specifications 9 Measured at 3 feet 1 0 m under the ceiling with evaporator duct and ceiling tile Operation Section 2 3 Characteristics Value range for each EWT shown in the graphs is based on the compressor speed EWT shown in the graphs is an abbreviation of Entering Water Temperature 1 How to read the characteristics lt Example gt Condition Cooling Capacity Dry Bulb 77 F 25 C Max 20100 Btu h Wet Bulb 59 F 15 C Min 9000 Btu h EWT 85 F 29 C EWT 45 F 7 C i EWT 85 F 29 C EWT 115 F 46 C Cooling Capacity at 7 1 gal min 27 L min x103 Btu h NNN LL MOO A NN AN ON Indoor Dry Bulb Temp F C NNNINN NOA SS Indoor Wet Bulb Temp F C 1LL00357 00 Operation Section 2 Cooling capacity curve EWT 45 F 7 C i EWT 85 F 29 C EWT 115 F 46 C Cooling Capacity at 7 1 gal min 2
50. or actuating circuit on Replace the relay board the relay board is short or open Then initialize the fan motor See page 42 E23 E23 4 Evaporator fan over rotation Check ducting of intake and exhaust air protection is activated and remove any foreign object preventing air flow RESET the controller 1 To RESET the controller press RESET button then press ON OFF button Repair Section 59 Condition Check Area Possible Cause Remedy Insufficient Cooling Air is not Compressor start delay 120 Compressor starts after 120 seconds Lem cool seconds is activated automatically displays Freeze protection is Compressor starts automatically when normally activated evaporator outlet pipe temperature CTS3 rises more than 43 F 6 C while compressor stops Unit Insufficient Air filter is clogged Clean or replace air filter operates air volume Leak or clogged on the duct Repair duct connection connection Insufficient Using longer duct length or Change the duct to proper size air volume smaller duct diameter than recommended Fan is locked Check for any foreign object causing fan lock Repair Section 8 4 Basic Inspection Perform the following inspection before disassembly 1 Inspection of plate fins To inspect the plate fins of the evaporator the air filter must be removed After removal of
51. page 84 RESET the controller 1 To RESET the controller press RESET button then press ON OFF button 56 Repair Section Self Diagnostic Condition Codes WMC cur ud Possible Cause Remedy Pattern Unit does User Service not operate Mode Mode E01 E01 2 Defective RTS1 thermistor Replace the WMC short or open E02 E02 2 Loose RTS2 thermistor Reconnect the RTS2 thermistor and connection check the connection RESET the controller Defective RTS2 thermistor Replace the RTS2 thermistor short or open RESET the controller E03 E03 2 Loose EWTS thermistor Reconnect the EWTS thermistor and connection check the connection RESET the controller Defective EWTS thermistor Replace the EWTS thermistor short or open RESET the controller E04 E04 2 Loose CTS1 thermistor Reconnect the CTS1 thermistor and connection check the connection RESET the controller Defective CTS1 thermistor Replace the CTS1 thermistor GD short or open RESET the controller displays ESI E05 E05 2 Loose CTS2 thermistor Reconnect the CTS2 thermistor and d connection check the connection diagnostic RESET the controller codes Defective CTS2 thermistor Replace the CTS2 thermistor short or open RESET the controller E06 E06 2 Loose CTS3 thermistor Reconnect the CTS3 thermistor and connection check the connection RESET the controller
52. rigerant Refrigerant Control Electronic Expansion Valve Type R 410A Amount 2 31 Ib 1 05 kg Water Connection Water Inlet and Outlet Unit side 3 4 in 19 mm NPT Female Signal Connection Fire Alarm Input Signal Type No voltage contact input Contact resistance less than 100 ohm Warning Signal Output 2 A at 30 V DC AC or less resistive load Dimension WxDxH Without Flange 45 4 x 31 5 x 20 0 in 1154 x 800 x 511 mm With Flange 49 4 x 35 4 x 20 0 in 1254 x 900 x 511 mm Weight Net 236 Ib 107 kg Shipping 271 lb 123 kg Condensate Pump Pump Rate 5 0 gal h 19 L h Capacity Head 4 ft 1 2 m Operating Condition Range Inlet Air Max 95 F 35 C 50 RH Temperature Min 55 F 12 C 50 RH Entering Water Max 115 F 46 C Temperature Min 45 F 7 C Water Pressure 150 psi 1034 kPa or less Recommended Water Flow Rate 7 1 gal min 27 L min Maximum Duct Length Cold Duct 120 ft 36 6 m Maximum Sound Level 55 dB A Safety Devices Compressor Overload Protector Included Fan Motor Overload Protector Included Freeze Protection Thermistor Included Overflowing Protection Switch Included Automatic Restart Power Interruption Included Compressor Time Delay 120 sec High Pressure Interruption Included Signal Input Output Included Control Devices Temperature Contr
53. rm a 1003203 leak check according to the procedure indicated in the next step Once the leak has been found and repaired evacuate the system once more and confirm the system holds vacuum 82 Repair Section 4 Checking for gas leaks Valve Setting LO Closed Closed Air Purging 3 Y YOpen The Valve of R efrigerant Cylinder 8 pA i Charging Hose 8 Red Green gt to Process Tube Fitting 1001901 Valve Setting Lo Hi Lo Hi Closed Open Gauge Reading Closed Closed 57 psi 390k Pa Low Pressure Valve Closed Valve Refrigerant Cylinder Valve Open Side Tube Cylinder R 410A YY Refrigerant Open High Pressure Process Tube Fitting High P ressure 1002228 1 Remove the charging hose green from the vacuum pump and connect the hose to the refrigerant cylinder R 410A 2 Loosen the nut on the gauge manifold side of the charging hose green 3 Open the valve of the refrigerant cylinder and perform air purging in the charging hose green Then tighten the nut 4 Open the high pressure valve of the gauge manifold Charge the system with refrigerant until the high pressure gauge indicates 57 psi 390 kPa After charging is complete close the high pressure valve 5 Open the valve of the refrigerant cylinder and perform air purging in the charging hose green Then tighten the nut
54. sor Condenser Inlet Pipe Water Inlet Pipe Water Outlet P ipe 1LL00278 00 Operation Section Flow of Refrigerant gt Flow of Water gt EWTS Entering Water Thermistor OLC Compressor Overload Relay CTS3 Evaporator Pipe Outlet Thermistor Water Accumulator Inlet gt Condenser Evaporator Compressor lt Water Condenser Thermistor Evaporator Outlet Fan Motor RTS2 Evaporator Air Inlet Thermistor High Pressure S witch Electronic Expansion Valve Water Regulating Valve CTS2 Evaporator P ipe Inlet Thermistor 1LL00277 00 20 Operation Section 4 2 Compressor This unit is equipped with a variable speed compressor which is driven by state of the art inverter technology A variable speed compressor automatically adjusts its speed as the heat load in the room changes With its soft start up a variable speed compressor reduces start up wear on the compressor and eliminates in rush current resulting in no dip in the power supply As an AC power signal is supplied to the inverter circuit it is then rectified and converted into a DC power signal with modulated frequency This modulated frequency controls the speed of the compressor As the compressor speed decreases the amount of refrigerant entering the evaporator also decreases This results in a more comfortable environment as the unit provides the appropriate amount of desired cool
55. t the water pipes 2 Connect tap water to the water inlet of the unit Connect water outlet of the unit to drain Drain Plug 1LL00437 00 Repair Section 65 Top Panel Screws 5 Top Panel a Screws 6 ILL00242 00 3 Take out the twenty one 21 screws and then remove the top panel NO e Valve Spring Guide ILL00436 00 4 Open the faucet handle to supply water 5 Insert screwdrivers under both sides of the valve spring guide of the water regulating valve and lift upwards to flush This manual flushing does not affect valve adjustment N CAUTION Do not move the adjusting bolt Take caution to prevent any corrosion inside the copper tube if cleanser is used to clean the water line 6 Keep flushing the water inside the water line through the drain until the water is clear 7 Disconnect tap water from the water inlet and outlet of the unit Repair Section 9 DISASSEMBLY 9 1 Parts Construction Evaporator Air Inlet Thermistor Evaporator Pipe Top Panel Inlet Thermistor Rear Panel Evaporator Pipe AC Fan Motor Outlet Thermistor Accumulator Entering Water Thermistor Condenser Condenser Thermistor AC Fan Motor Si Float S witch Left Panel Control Box Frame Left Panel Front Panel Service Panel Right Panel Evaporator Evaporator Fan Internal Drain Pump Drain P
56. ted When a communication fail he STI STI module ailure Gei eS E11 E11 icati e module and microcomputer ion error SE on the relay board is detected for at least 40 seconds Cohiprassorimp tbver When excessive current from E14 P P ee the STI module to the current compressor is detected When the compressor motor is E15 Compressor lock locked and its operational failure checking detects no change in EU the compressor rotation position E16 Compressor phase e When one phase is detected interruption abnormality as 0 A m When an abnormality in the Motor position E17 4 e ON compressor motor rotation detection abnormality RS position is detected ee ee When excessive current from E18 i P e the power source to the STI S RT module is detected Power device When STI module E19 temperature ee temperature that exceeds the abnormality specified value is detected When a DC voltage or current DC voltage that is at or below the specified E20 ojo E13 abnormality value or at or above the specified value is detected When a compressor startup E21 Power device damage current voltage that is at or abnormality below the specified value is detected When a short or open in the E22 Circuit malfunction e STI internal current voltage detection circuit is detected Evaporator fan motor When an evaporator fan E23 E23 over rotation ej o o motor rotates at speed 1150 abnormality rpm or above
57. the MWT its settings are also required 4 Close the service panel and secure with the nine 9 screws 5 Tighten the bottom screw 10 Repair Section REFRIGERATION AND WATER SYSTEM REPAIR 10 1 Repair of Refrigeration and Water System 1 2 3 In case there is a leak obstruction or problem in the refrigeration and water system of this unit replace or repair the part in question After replacing any component all connections must be brazed except the flare connections of the water regulating valve Proper brazing techniques It is desirable to use a slightly reduced flame Oxyacetylene is commonly used since it is easy to judge and adjust the condition of the flame Unlike gas welding a secondary flame is used for brazing It is necessary to preheat the base metal properly depending on the shape size or thermal conductivity of the brazed fitting The most important point in flame brazing is to bring the whole brazed fitting to a proper brazing temperature Care should be taken to not cause overflow of brazing filler metal oxidation of brazing filler metal or deterioration due to the overheating of flux Brazed fittings and fitting clearance In general the strength of brazing filler metal is lower than that of the base metal So the UE Om d shape and clearance of the brazed fitting are a 0 025 0 075 mm quite important As for the shape of the brazed fitting itis necessary to maximize its adhesive
58. the unit is divided B into two sections One section contains the p evaporator which cools room interior air The other section is comprised of the condenser compressor and control box Control Box Condenser y Evaporator 1LL00279 00 3 4 Air Flow Air taken in from the room air intake is cooled 4 by the evaporator and then blown through the cool air supply Cool Air Supply Evaporator Air Intake ILL00280 00 3 5 Water Flow This unit has two water connectors on the rear panel Water is flown in from the water inlet and extracts the heat from the water cooled condenser Then the water is flown out from the water outlet Operation Section 4 REFRIGERATION AND WATER SYSTEM 4 1 Refrigeration and Water System Construction The component parts of the refrigeration and water system include the following Compressor Evaporator Condenser Accumulator Electronic expansion valve High pressure switch Water regulating valve These parts are all connected by copper piping All the connections are brazed except the flare connections of the water regulating valve Electronic Expansion Valve Compressor Suction Pipe p Insulated A High Pressure Switch Compressor Discharge Pipe M Water Regulating Valve CH Condenser Outlet P ipe Evaporator Inlet Pipe Evaporator Outlet Pipe Assembly Connecting Pipe Accumulator Condenser Compres
59. tic Code Records Display Operation Only When Connected With WMC 40 K DENTEN ne EEN 42 107 NEE 44 7 7 Compressor Operation 45 7 8 Electronic Expansion Valve Operation 45 7 9 Evaporator Fan Motor Operation oooooccccooccno eee 46 7 10 Internal Drain Pump Operation 00 ccc ttt tenes 46 7211 AntizFrost Control wet is cen Poe tee dab tots eed its EEN 47 7 12 Fan Motor Reverse Rotation Protechon lille nh 47 7 13 Automatic Restart After Power Interruption Automatic Recovery Function 47 Table of Contents Repair Section 8 TROUBLESHOOTING 8 1 TIroubleshiooting eb a dd Red LER RE 48 8 2 Self Diagnostic Codes 49 8 3 TroubleshootingiGhart 5o vpiseEEbbuuti equeedrt PhppnettubtueRebvbaetiosewqurbt is 54 8 4 Basic lrispectlOn oda eite A NE RE adde EO DES 60 8 5 Inspection of COMPpressor o ooccco hh 61 8 6 Inspection of Electronic Expansion Valve Control Col 62 8 7 Inspection of Thermistor llle rh 62 8 8 Inspection of Wiring Connection liliis ns 62 8 9 Inspection of Refrigeration System liliis es 63 8 10 Inspection of Water System 0 2 20 ehh 64 9 DISASSEMBLY 9 1 Parts Gonstrucllon s cscs cots ice ias areae abe t ea re e tare S Qe bee Ete iet LE 66 9 2 Disassembly one ee ee ee ne acie OI eg ERU e ee e eee e 67 9 3 Removal of Evaporator Fan Assembly n 70 9 4 Removal of Electrical Components 72 10 REFRIGERATION AND WATER SY
60. ting as soon as the brazing filler metal has flown into the clearance Since the brazing filler metal flows easily into portions Tube heated to the proper temperature it is essential enee to keep the whole fitting at the proper brazing temperature Vertical Up J oint Tube Burner Brazing Filler Metal 1001725 Repair Section 77 10 2 Removal of Refrigeration and Water System Components AX WARNING Before replacing any refrigeration and water system component recover the refrigerant using standard recovery procedures and equipment and drain the water from the unit When recovering the refrigerant use the pinch off tubes at the low pressure side tube 1 and high pressure side tube 2 as shown in the figure below N CAUTION To prevent oxidation dry nitrogen should be conducted flow rate 0 27 gal min 1 L min through the pinch off tube during any brazing operation During any component replacement involving brazing shield nearby parts with a steel plate etc to protect them from the flame Partto Replace Disconnect at Compressor A Condenser B J K L E le 5 Tube 1 Tube Electronic Expansion Valve C D Bi M Pipe 2 E vaporator E F G H gt High P ressure Switch M F e WS AL Water Regulating Valve L O SD A Nd rN Es AER SS G N C 1LL00250 00 lt NOTE gt Wh
61. trical components replaced must be genuine MovinCool parts purchased from an authorized reseller Before replacing any refrigeration and water system components recover the refrigerant using standard recovery procedures and equipment and drain the water from the unit When handling refrigerant always wear proper eye protection and do not allow the refrigerant to come in contact with your skin Do not expose refrigerant to an open flame The power supply for this unit should be a dedicated single outlet circuit with a UL recognized short circuit and ground fault protective breaker to prevent electrical shock from the unit When brazing any tubing always wear eye protection and work only in a well ventilated area Disconnect power before servicing unit Be careful of any sharp edges when working on the unit Operation Section 7 2 SPECIFICATIONS 2 1 Exterior Dimension Diagram Be a EI D H fr e LO Sek Ub P Ed H a Y of dd E Y lt a 4 x DIA 0 6 s DIA 14 29 8 16 0 so 81 5 UNIT inch 1LL00274 00 8 Operation Section 2 2 Technical Specifications ITEM SPECIFICATIONS Electronic Features Control Wall Mounted Controller Included Set Point Max 95 F 35 C Temperature Range yin 55 F 13 C Electrical Characteristi
62. ure Valve High P ressure Side Tube Vacuum Pump in Operation 1002227 1 Properly remove the crushed end of the pinch off tubes at the high pressure side of the refrigerant cycle with a pipe cutter 2 Fit the process tube fitting to the pinch off tube 3 Connect the charging hoses red high pressure side for the gauge manifold to the process tube fitting lt NOTE gt Connect the hoses using care not to mistake the high pressure side for the low pressure side and vice versa 4 Connect the charging hose green at the center of the gauge manifold to the vacuum pump 1 Open the high pressure valve HI of the gauge manifold 2 Turn on the vacuum pump to start evacuation Evacuate the system for approximately 15 minutes 3 When the high pressure gauge indicates 30 inHg 100 kPa or higher turn off the vacuum pump and close the high pressure valve of the gauge manifold Repair Section 81 3 Checking vacuum 1 Leave the high pressure valve and the low E Leave valves closed for 5 raimites OF nate Pointer af pressure valve of the gauge manifold closed for 5 Closed Closed pressure gauge returning to minutes or more and confirm that the gauge p G zero indicates there is a leak ne us pointer does not return to zero 2 If the gauge pointer returns gradually to zero there is a leak somewhere in the system this Pipe Brazing could also include gauge manifold Perfo
63. valve of the refrigerant cylinder 2 Removal of gauge manifold d Pinch Off Tool to Gauge Manifold Side N 7 CA to Refrigerant Cycle Side cis Process Tube Fitting 1002185 Repair Section 85 1 Crimp the pinch off tube with a pinch off tool 2 Remove the gauge manifold and the process tube fitting Crush the end of the pinch off tube 3 Braze the end of the pinch off tube 4 Ensure that a gas leak is not present at the pinched off portion and the brazed end Repair Section 11 REASSEMBLY 11 1 Reassembly of Unit Reassemble the unit in the reverse order of removal Described below are the parts that require special care in reassembling the unit Perform all wiring or rewiring as referenced in the wiring diagram 11 2 Compressor Mounting Mount the compressor on the frame using cushions steel collars plate washers and nuts Plate Washer Cushion Steel Collar 1LLOO178 00 11 3 Evaporator Fan Assembly Install the evaporator fan Allow a clearance of 0 12 inch 3 0 mm or more on each side of the evaporator fan See page 71 11 4 Wiring Notice Secure the wires using clamps so that the wires do not come into contact with the edges of the structure etc Secure the wires using clamps in the same position they were before removal 11 5 Perform the Inspection Perform the cooling performance inspection and check
64. vices such as alarm speakers light indicators etc NOTE Use the recommended warning signal wire size from 16 AWG to 26 AWG for a solid wire or 16 AWG to 22 AWG for a stranded wire Connect the warning signal wires to terminal L and L in the unit control box according to the labels shown below Unit Terminal Warning Device 1LL00286 00 Operation Section 35 6 5 Fire Alarm Control Panel Connection Input Signal Terminal E and E The unit is equipped with a normal open input signal that can be connected directly from the fire alarm control panel When receiving the signal from the fire alarm control panel the unit turns off and does not turn back on until it has been reset lt NOTE gt Use the recommended fire alarm signal wire size from 16 AWG to 26 AWG for a solid wire or 16 AWG to 22 AWG for a stranded wire Connect the fire alarm signal wires to terminal E and E in the unit control box according to labels shown below Unit Terminal Fire Alarm
65. wer supply has been OFF for 15 minutes 1 Inspection of power source voltage Check the voltage of the power source Single phase 208 230 V 60 Hz Check the operation and condition of the fuse or circuit breaker in the power source 2 Inspection of air filters Remove the air filters and check the element If the element is dirty wash as described in the OPERATION MANUAL supplied with the unit Repair Section 49 8 2 Self Diagnostic Codes Self diagnostic codes are displayed on the WMC and indicate by LED on the relay board under the following conditions Refer to the troubleshooting chart on page 54 to 58 for the remedies LED on the relay board indicates self diagnostic codes for the MWT under the following conditions Refer to the troubleshooting chart on page 54 to 58 for the remedies LED 7 green on the relay board turns on when the power is supplied to the unit Self Diagnostic Relay Board Code Alarm LED Red turns on Warning Possible Cause P Signal Detection Contents User Service attern lea es Output Mode Mode When receiving fire alarm AL AL Fire alarm input 1 e ee signal input Co d nsationov rtiow When drain pan float switch PU PU 3 e ee is OFF continuously for 60 Internal drain pump ON seconds Wh ional drai fl Condensation overflow eg optiona drain par n E07
66. witch configuration and setting The controller of the unit is equipped with DIP switches that default in the OFF position The DIP switch can be set to configure the following functions ON OFF 1 2 1 2 1 2 3 4 1 2 3 4 DSW1 DSW2 DSW3 DSW4 1003192 Switch Switch Function Name Number ON Enables the MWT OFF Enables the WMC DSW1 ON 2 No function OFF i ON Initializes setting of the evaporator fan motor after replacing the fan motor OFF Set to OFF when the motor replacement is completed DSW2 ON 2 No function OFF ON Enters the test mode OFF Exits the test mode ON 2 No function OFF DSW3 ON 3 No function OFF ON 4 No function OFF ON 1 OFF ON 2 OFF DSWA No function ON 3 OFF ON 4 OFF Operation Section eg 5 4 Compressor Motor This unit uses an inverter controlled DC compressor The compressor motor is operated by three phase voltage outputted from the STI module on the relay board Specifications Rated Voltage DC 220 V Rated Output 1380 W 5 5 Compressor Overload Relay An external compressor overload relay is used to protect the compressor motor This relay is mounted within the connector housing that attaches to the top of the compressor The Points relay interrupts high temperature build up in the compressor Bimetal
67. y across the terminals Specifications OFF Open contact 248 F 120 C ON Closed circuit 203 F 95 C If there is no continuity across the terminals replace the overload relay Repair Section 61 1003180 1001701 62 Repair Section 8 6 Inspection of Electronic Expansion Valve Control Coil Measure resistance across the connector pins of the electronic expansion valve control coil e Between connector pins at 68 F 20 CH Blue Red Approx 46 ohm Amber Red Approx 46 ohm Yellow Red Approx 46 ohm White Red Approx 46 ohm If the measured resistance is not equal to these standard values replace the electronic expansion valve control coil 8 7 Inspection of Thermistor Using an ohmmeter check the resistance value across the 2 pin connector Thermistors Evaporator air inlet thermistor RTS2 Entering water thermistor EWTS Condenser thermistor CTS1 Evaporator pipe inlet thermistor CTS2 Evaporator pipe outlet thermistor CTS3 8 8 Inspection of Wiring Connection Connector Number 1 1003194 N e Thermistor Specification m Un Un Resistance k ohm ER ee 0 32 41 50 59 68 77 86 95 104 133 122 10 15 20 25 30 35 40 45 50 0 5

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