Hitachi RAS-10HRNM, Service Manual, Page: 303 / 482

8.2.5 Cause of inverter stoppage
Code Cause
Cause of Stoppage
for Corresponding
Unit
Remark
Indication
during Retry
Alarm Code
1
Automatic Stoppage of Transistor Module
(DIP-IPM Error)
(Overcurrent, Undercurrent, Temperature increase)
17 P7 53
2 Instantaneous Over Current 17 P7 48
3
Abnormal Inverter Fin Thermistor
17 P7 54
4
Electronic Thermal Activation (Inverter overcurrent)
17 P7 48
5
Inverter Voltage Decrease (Undervoltage)
18 P8 06
6
Over Voltage
18 P8 06
7
Abnormal Inverter Transmission
18  
8
Abnormal Current Detection
17 P7 51
9
Instantaneous Power Failure Detection
18  
11
Reset of Micro-Computer for Inverter
18  
12
Earth Fault Detection from Compressor
(Only Starting)
17 P7 53
13
Phase detection abnormality
18  
14
Inverter Non-Operation
18  55
15
Inverter Non-Operation
18  55
16 Inverter Non-Operation 18 P8 55
17 Communication Abnormality 18 P8 55
18 Protection Device Activation (63H1)   02
19 Protection Detection Device Abnormality   38
Protection control code on 7-segment display
1 Protection control code is displayed on 7-segment when a protection control is activated.
2 Protection control code is displayed while function is working, and goes out when released.
3 When several protection control are activated, code number with higher priority will be indicated (see below for the
priority order).
a Higher priority is given to protection control related to frequency control than the other.
•
Priority order
– High-Pressure Increase Protection
– Over Current Protection
– Cold Draft Protection
– Low-Pressure Ratio Control at Cooling Operation
b In relation to retry control, the latest retrial will be indicated unless a protection control related to frequency control
is indicated.
Code Protection Control
P 0 Low-Pressure Ratio Control at Cooling Operation
P 1
High-Pressure Ratio Control at Heating Operation
P 2
High-Pressure Increase Protection
P 3
Over Current Protection
P 4
IPM Fin Temperature Increase Protection
P 5
Discharge Gas Temperature Increase Protection
8 Troubleshooting
295
SMGB0060 rev. 1- 12/2010
8