Hitachi SAMURAI Series Service Manual page 110
Water cooled water chillers -modular-r134a-screw type
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Also See for SAMURAI Series:
- Service manual (137 pages) ,
- Service manual (174 pages) ,
- Manual (118 pages)
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4 Troubleshooting
Troubleshooting by alarm code
C1-71
Alarm code
Alarm stop reason
Compressor motor overheats, activating internal thermo. (Activation point: 115ºC)
?
N O T E
Causes alarm stop with 3 occurrences in 30 minutes. Retry control until the second one (Compressor stops, and restarts automatically
once de thermostat returns to a normal operation temperature)
Retry indication
LCD: By touching "Inspection", "49C Retry" is shown in "No.1 Cycle".
Retry code
C1-P5
PCB monitoring position
PCBd (I/O PCB) PCN207 (Internal thermo for compressor (49C))
Operation
control results
in retry status
immediately
Yes
The connection and
insertion of connector
CN207 on PCBd (I/O PCB)
are correct
Remove the wiring
inserted into connector
PCN207 on PCBd (I/O PCB)
and mesure conductivity. Is
there conductivity?
Check of PCBd (I/O PCB)
102
SMGB0120 rev.0 - 11/2017
Compressor Internal Thermo Activation
No
No
Yes
No
Yes
Power source too high or too low
Phase unbalance of the power source
voltage
Lock status of compressor motor
Decrease of insulation of compressor motor
Revision of connections
Check of wiring (disconnection)
Check of compressor (internal disconnection)
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Table of Contents
Troubleshooting
