Hitachi RCUE40AG2 Service Manual page 101

Troubleshooting
Indication of inverter (fan module) for control of fan revolution number

Fan module has protection control and indicates abnormal code on the segment.
− List of inverter abnormal code
Segment Indication
abnormal code
 
 
 
 
 
List of state at inverter retry
−
Segment Indication
abnormal code
 
 

NOTES:
"n": Cycle Nº (n=1-5)
"m": Fan Nº (m=1-4)
In case of fan abnormal operation, retry is performed in every case and in case that the same abnormal
operation occurs in specifi ed times within specifi ed period, unit is stopped by alarm.
Retry:
1. Retry in fan by itself (compressor keeps operating. Re-start in 10 seconds)
2. Retry in cycle by itself (compressor also stops. Re-start in 3 minutes).
In case of retry in cycle by itself, retry is indicated like above "list of state at inverter retry". In case of retry in
fan by itself, it is possible to confi rm which fan is being retried in check mode.
pag. 99
SMGB0003 rev.0 - 01/2007
Contents
Inverter Speed Control Abnormality
Inverter Excess Current Protection Abnormality
Inverter Position Detection Abnormality
Transmission Abnormality between Inverter and CPU PCB or between
Fan Speed Control PCB
Voltage Shortage or Excess Voltage in Inverter
Contents
During retry control at simultaneous abnormal in some (majority) fans
(Fan single retry)
Abnormal code during retry control in Fn-4m, Fn-5m
5 5