Mitsubishi Electronics PCH36GK, PCH24GK, PCH30GK, PCH42GK specifications OC277-33, Indoor fan control

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4The compressor will not start when the room temperature is 64°F or below.

The compressor starts intermittent operation when the power is turned ON with room temperature above 64°F. The com- pressor ON/OFF time depends on the thermostat ON/OFF and the following room temperatures.After 3-minute compres- sor operation,

If the room temperature thermistor reads above 85°F with thermostat ON, the compressor will operate for 6 more min- utes and then stop for 3 minutes.

If the room temperature thermistor reads 79°F to 82°F with thermostat ON, the compressor will operate for 4 more minutes and then stop for 3 minutes.

If the room temperature thermistor reads 75°F to 79°F with thermostat ON, the compressor will operate for 2 more minutes and then stop for 3 minutes.

If the room temperature thermistor reads below 75°F with thermostat ON, the compressor will stop for 3 minutes.

If the thermostat is OFF regardless of room temperature, the compressor will stop for 10 minutes.

5Coil frost protection

Coil frost protection in DRY operation is the same as in COOL operation.

6Coil frost prevention

Coil frost prevention does not operate in DRY operation.

(2)Indoor fan control

The indoor fan runs on LOW speed during compressor operation. The fan speed cannot be changed with the remote con- troller. Also, the indoor fan does not run during compressor OFF.

(3)Auto vane control

Same as in COOL operation

(4)Detecting abnormalities in the outdoor unit

An abnormality in the outdoor unit can not be detected in DRY operation.

OC277-33

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Contents OC277-1 ContentsOC277-2 FeaturesEasy Maintenance no Maintenance Necessary for 2500 Hours OC277-3Improving Efficiency of Piping Work OC277-4 Part Names and FunctionsOC277-5 Remote controller operation buttonsOC277-6 Remote controller displaySpecifications OC277-7Models PCH24GK, PCH30GK, PCH36GK, PCH42GK OC277-8 DataModels PCH24GK, PCH30GK, PCH36GK, PCH42GK Performance Data CFM SHC TPCCFM OC277-9Performance Curve OC277-10PCH36GK Cooling Capacity PCH36GK Heating Capacity OC277-11Condensing Pressure and Suction Pressure OC277-12PCH30GK OC277-13PCH36GK OC277-14PCH42GK OC277-15OC277-16 Standard Operation DataSHF PCH24GK PCH30GK PCH36GK PCH42GK Operating Range OC277-17Outlet AIR Speed and Coverage Range Additional Refrigerant Charge R22ozNoise Criterion Curves PCH24GK OC277-18PCH30GK PCH36GK PCH42GKOutlines and Dimensions OC277-19Indoor unit PCH24GK Indoor unit PCH30/36/42GK OC277-20Remote controller Refrigerant System DiagramOC277-21 PCH30GK PCH36GK PCH42GKWiring Diagram Model PCH24/30/36/42GK Wiring DiagramOC277-22 Operation FLOW-CHART OC277-23Main Operation Cooling Operation OC277-24DRY Operation OC277-25DRY YESHeating Operation OC277-26Microprocessor Control OC277-27Outline of Microprocessor Control OC277-28 How to operateIndoor Unit Control Compressor controlStart condition OC277-29Coil frost protection Termination conditionsAuto vane control OC277-30Swing Auto ReturnOC277-31 Detecting abnormalities in the outdoor unitRange a Range B Range C DRY operation time chart How to operate OC277-32DRY operation OC277-33 OC277-34 Heat operation time chartHeat operation Display in Heat operationOverheat protection OC277-35Booster heater control Overheat preventionIndoor coil temperature abnormality detection OC277-36Defrosting operation Mode change Initial mode How to operateTemperature range OC277-37OC277-38 COOL/DRY operationAuto return Timer function Timer operationOC277-39 Test run Before test runOC277-40 Emergency operationBefore emergency operation On remote controller board Dip switch functionsOC277-41 On indoor controller boardOC277-42 Fan motor max. rotational frequency Service RefPCH24GK PCH30GK PCH36GK PCH42GK SW7 OFF PCH36, 42GKTrouble Shooting Remote Controller Display AbnormalityOC277-43 For group control using one remote controller When malfunction occurs during operationOC277-44 Example Check Unit code addressOC277-45 OC277-46 Wrong Wiring on SiteCool HeatOther Troubles and Causes OC277-47How to check the parts OC277-48PCH OC277-49 OC277-50 System ControlVariety of System Control Functions PAC-SA89TA-EHow to wire Group Control with a Single Remote ControllerHow to set unit-address OC277-51Remote ON-OFF and Individual Remote Controls Control Using TWO Remote ControllersHow to set SW17-7 See Figure Remote controller LCD indicationBasic wiring Individual Control by Grouping the Remote ControllersSwitch function of remote ON-OFF switch OC277-53Timer Operation or the Operation by AN External Signal Multiple Remote Control DisplayOC277-54 Auto Restart FunctionPCH24GK Operating Procedure Disassembly ProcedureOC277-55 Removing the air intake grilleRemoving the fan motor OC277-56Removing the sirocco fan Removing the side panelOC277-57 Operating Procedure PhotosRemoving the vane motor Removing the Indoor coil thermistorRemoving the drain pan OC277-58Removing the guide vane Remove the intake grilleOC277-59 Removing the support heaterRemoving the heat exchanger Parts List OC277-60Structural Part PCH24GK OC277-61 Structural Part PCH30GK PCH36GK PCH42GK OC277-62OC277-63 FAN and Heater Parts PCH24GK OC277-64FAN and Heater Parts PCH30GK PCH36GK PCH42GK OC277-65Electrical Parts PCH24GK10 PCH30GK PCH36GK PCH42GK OC277-66Timer Optional PartsOC277-67 OC277-68 PAC-SC32PTA Weekly Timer Setting DisplayNames and functions SET Back DisplayMultiple Remote Controller Adapter Timer AdapterOC277-69 Refrigerant PipesSpecifications are subject to change without notice