Mitsubishi Electronics PKH24FL, PKH36FL, PKH30FL Emergency operation, Before emergency operation

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(1)Indoor coil temperature code

During the test run, the indoor coil temperature code from 1 to 15 is displayed on the remote controller instead of room temperature. The code should fall with the lapse of time in normal COOL operation, and should rise in normal HEAT operation.

Code

1

2

3

4

5

6

7

8

 

 

 

 

 

 

 

 

 

Indoor coil temperature

~34(36)°F

36(37)°F~50°F

~59°F

~68°F

~77°F

~86°F

~95°F

~104°F

 

 

 

 

 

 

 

 

 

Code

9

10

11

12

13

14

15

 

 

 

 

 

 

 

 

 

 

Indoor coil temperature

~113°F

~122°F

~131°F

~140°F

~158°F

~191°F

Thermistor abnormality

 

 

 

 

 

 

 

 

 

 

(2)Trouble during test run

●If the unit malfunctions during the test run, refer to section 10 in this manual entitled “TROUBLESHOOTING.”

●When the optional program timer is connected to the conditioner, refer to its operating instructions.

2-8 Emergency operation

When the remote controller or microprocessor malfunctions but all other parts are normal, emergency operation is started by setting the dip switch SW3 on the indoor controller board.

<Before emergency operation>

1.Make sure the compressor and the indoor fan are operating normally.

2.Locate the defect with the self-diagnostic function. When the self-diagnostic function indicates “protective function is working”, release the protective function before starting the emergency operation.

CAUTION: When the self-diagnostic function indicates a check code of “P5” (drain pump malfunction), do not start the

emergency operation because the drain may overflow.

<How to operate>

1.For emergency cooling, set the dip switch SW3-1 to ON and SW3-2 to OFF. For emergency heating, set the dip switch SW3-1,2 to ON.

Emergency

Emergency

Normal

 

cooling

heating

operation

 

2

2

2

SW3

1

1

1

 

1 ON

1.2 ON

1.2 OFF

 

Indoor controller board

2.Turn ON the outdoor unit breaker and then ON the indoor unit breaker. Emergency operation will now start.

3.During emergency operation, the indoor fan operates on high speed, the auto vanes do not operate.

4.To stop emergency operation, turn OFF the indoor unit breaker.

5.Movements of the vanes do not work in emergency operation, therefore you have to slowly set them manually to the appropriate position.

NOTE: The remote controller POWER ON/OFF button can not start/stop emergency operations.

CAUTION: Do not use emergency cooling for more than 10 hours, as the indoor coil may freeze.

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Contents Revised EDITION-A ContentsFeatures Part Names and Functions Models PKH18FL, PKH24FL, PKH30FL, PKH36FL SpecificationsModels PKH18FL, PKH24FL, PKH30FL, PKH36FL Performance Data DataHeating Capacity PKH18FL Performance CurvePKH24FL PKH36FL Heating Mode PKH18FL Cooling ModeCondensing Pressure and Suction Pressure Indoor DB temperature F 80 psi.G Pressure Suction PKH24FL Cooling ModePKH30FL Cooling Mode PKH36FL Cooling Mode SHF PKH18FL PKH24FL PKH30FL PKH36FL Standard Operation DataOutlet AIR Speed and Coverage Range Operating RangeWith wind baffle D.B F if no wind baffle PKH30FL Noise Criterion CurvesPKH36FL Band Center FREQUENCIES, HzPKH24FL OutlinesUnit inch Inch PKH36FL PKH30FLWireless Remote Controller Refrigerant System DiagramPKH18FL PKH24FL PKH30FL PKH36FL Models PKH18FL, PKH24FL, PKH30FL, PKH36FL Wiring Diagram Wiring DiagramMain Operation Operation FLOW-CHARTCooling Operation YES DRY OperationYES FAN Speed no Heating OperationOutline of Microprocessor Control Microprocessor ControlHow to operate Cool operation time chartIndoor Unit Control Cool operationStart condition Compressor controlCoil frost protection Termination conditionsAuto Return Auto vane controlDetecting abnormalities in the outdoor unit DRY operation DRY operation time chart How to operateFan control in DRY operation Heat operation Heat operation time chart How to operateDisplay in Heat operation Booster heater control Overheat protectionOverheat prevention Defrosting operation Indoor coil temperature abnormality detection Mode change Initial mode Temperature range COOL/DRY operation Auto vane controlAuto return Timer function Timer operationTest run Before emergency operation Emergency operationOn remote controller board On indoor controller board Dip switch and jumper connector functionsIndoor FAN Control Model No Wireless remote controller pair number setting operationSelf-check TroubleshootingOther Troubles and Causes Between remote controller and indoor unit Wrong Wiring on SiteCheck points HOW to Check the PartsOperating Procedure PHOTOS&ILLUSTRATION Disassembly ProcedureIndoor unit PKH24FL PhotoRemoving the intake grilles Removing the vane motorRemoving the drain pan Removing the line flow fan and the fan motor Operating Procedure PhotosRemoving the electrical heater Electrical Parts PKH18FL PKH24FL PKH30FL PKH36FL Parts ListT7W E13 Qty / set Wiring Parts No Parts Name SpecificationsT7W E14 R01 12G 621PKH24FL PKH30FL PKH36FL Structural PartsPage Distributed in Dec No.OC276 New publication, effective Nov Specifications are subject to change without notice
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