Hitachi RAS-(4-12)HRNM(2)(E) - Cause of Indoor Unit Stoppage; Cancellation of Forced Thermo off

8 Troubleshooting
293
SMGB0064 rev.0 - 08/2011
8
Cause of Indoor Unit stoppage (20)
Indication Contents
00
Operation OFF, Power OFF
01
Thermo-OFF
02
Alarm
03
Freeze Protection Overheating Protection
05
Instantaneous Power Failure at Outdoor Unit
06
Instantaneous Power Failure at Indoor Unit
07
Stoppage of Cooling Operation due to Low Outdoor Air Temperature
Stoppage of Heating Operation due to High Outdoor Air Temperature
10
Demand thermo OFF
13
Retry for Pd Increase Prevention
15
Vacuum / Discharge Gas Temperature Increase Retry
16
Retry Due to Discharge Gas SUPERHEAT Decrease
17
IPM Error Retry, Instantaneous Over Current of Inverter Retry, Electronic Thermal Activation of
Inverter Retry, Abnormal Current Sensor of Inverter Retry
18
Retry due to Inverter Voltage Decrease
Retry due to Inverter Overvoltage
19
Other Retry
20
Different Operation Mode between Indoor / Outdoor Units
(Only for Individual Twin / Triple / Quad Types)
21
Forced Thermo-OFF
(Only for Simultaneous Twin / Triple / Quad Types)
22
Forced Thermo-OFF
(During Compressor Pre-heating)
24
Thermo-OFF during Energy Saving Operation Mode
Cancellation of Forced Thermo OFF
Turn ON the power source and wait for more than 30 seconds. Then press PSW1 and PSW3 simultaneously for more than
3 seconds.
Forced Thermo-OFF (Indoor Unit Error Code 22) will be cancelled.
However, this function may damage the compressor, use only on inevitable occasion.
• In case of using the remote control switch (PC-ART), the cancellation is also available with it.
• When “Operation Lock” indication ashes on the remote control LCD, press FAN SPEED and LOUVER switches si-
multaneously for more than 3 seconds.
• “Operation Lock” Indication is disappeared and operation is available.