Hitachi SAMURAI Series Service Manual page 116
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
C1-24
Alarm code
Alarm stop reason
Thermistor for detection of heat exchanger outlet (Tl) (condenser liquid) temperature indicates an abnormal value.
PCB monitoring position
PCBd (I/O PCB) CN24 (Liquid thermistor (Tl))
?
N O T E
Refer thermistor characteristics chapter
C1-25
Alarm code
Alarm stop reason
Thermistor for detection of heat exchanger outlet (Two2) (rear side = internal part of the heat exchanger) indicates an
abnormal value.
PCB monitoring position
PCBd (I/O PCB) CN25 (Outlet rear side thermistor (Two2))
?
N O T E
Refer thermistor characteristics chapter
108
SMGB0120 rev.0 - 11/2017
Liquid THM abnormality (CN24)
The connection and
insertion of connector
CN24 on PCBd (I/O PCB)
are correct
Yes
Removet he
connectors and
measure thermistor resistance.
Is resistance value
normal?
Yes
Outlet rear side THM abnormality (CN25)
The connection and
insertion of connector
CN25 on PCBd (I/O PCB)
are correct
Yes
Remove the
connectors and
measure thermistor resistance.
Is resistance value
normal?
Yes
No
Correction of connections
No
Replace thermistor
Replace PCBd (I/O PCB)
No
Correction of connections
No
Replace thermistor
Replace PCBd (I/O PCB)
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Table of Contents
Troubleshooting
