3-40
SM-18006
TROUBLESHOOTING
(2) Emergency Mode Operation from Water Source Unit PCB for Compressor Failure
((H,Y)VWH(P,R)144B(3,4)2S to (H,Y)VWH(P,R)216B(3,4)2S)
• Emergency operation is available only when the alarm codes above (*) are indicated.
• The emergency operation is not available for malfunction of the inverter PCB.
• Thisemergencyoperationisnotanormaloperationbutatemporaryoperationuntilqualied
service personnel arrive. If the alarm is indicated again during the emergency operation, the alarm
cannot be canceled.
• Do not perform an emergency operation for more than eight hours. Otherwise, the unit may be
damaged.
Alarms Corresponding to Inverter Compressor Failure
06: Abnormality of Inverter Voltage
23: Abnormality of Discharge Gas Thermistor
48: Activation of Overcurrent Protection Device
51: Abnormality of Inverter Current Sensor
53: Inverter Error Signal Detection
(a) Emergency Mode Operation Procedures
1. Turn OFF all the main switches of water source and indoor units.
2. Disconnect the inverter compressor wiring of the inverter PCB (INV1 or INV2).
(Insulate the disconnected terminals.)
3. Turn DSW5-No.1 or No.2 ON to stop the inverter compressor operation. Not all the
compressors in the failed water source unit will stop operation. If two compressors are stopped
simultaneously, the stoppage cause is supposed to be d1-30 (retry by stopping two of the
compressors).
4. Turn ON the power supply.
5. Start the operation with the wired controller.
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