Hitachi RAS-2-HVNP Service Manual page 287

8. Troubleshooting
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 21) 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 flashes 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.
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Cause of inverter stoppage (
Code
Automatic Stoppage of Transistor Module
1 (DIP-IPM Error)
(Overcurrent, Undercurrent, Temperature increase)
Instantaneous Over Current
2
Abnormal Inverter Fin Thermistor
3
Electronic Thermal Activation (Inverter overcurrent)
4
Inverter Voltage Decrease (Undervoltage)
5
Over Voltage
6
Abnormal Inverter Transmission
7
Abnormal Current Detection
8
Instantaneous Power Failure Detection
9
Reset of Micro-Computer for Inverter
11
Earth Fault Detection from Compressor
12
(Only Starting)
13 Phase detection abnormality
14 Inverter Non-Operation
15 Inverter Non-Operation
16 Inverter Non-Operation
17 Communication Abnormality
18 Protection Device Activation (PSH)
19 Protection Detection Device Abnormality
20 Early Return Protection Device
21 Step-Out Detection
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Table of capacity codes of indoor unit
Code Equivalent horsepower
0.8
06
1.0
08
1.3
10
1.5
11
1.8
13
273
SMGB0079 rev.0 - 01/2013
21
)
24
)
Cause
Code Equivalent horsepower
2.0
14
2.3
16
2.5
18
3.0
22
4.0
32
Cause of Stoppage
for Corresponding
Indication
Unit
during Retry
17 P7
17 P7
17 P7
17 P7
18 P8
18 P8
18 -
17 P7
18 -
18 -
17 P7
18 P8
18 -
18 -
18 -
18 -
- -
- -
18 P7
17 -
Code Equivalent horsepower
40
48
64
80
Remark
Alarm Code
53
48
54
48
06
06
-
51
-
-
8
53
-
55
55
55
55
02
38
53
31
5.0
6.0
8.0
10.0