4 Troubleshooting
Troubleshooting by alarm code
SMGB0120 rev.0 - 11/2017
116
Alarm code
2C-2C
Water supply header temperature thermistor abnormality. (CN13)
Alarm stop reason
Thermistor for detection of
water supply header temperature
indicates an abnormal value.
Replace thermistor
Revise connections
Replace PCBc
(CPU PCB)
Yes
Yes
No
No
Remove the
connectors and
measure thermistor
resistance.
Is resistance value
normal?
The connection and
insertion of connector
CN13 on PCBc (CPU PCB)
are correct
Alarm code
2d-2d
Water return header temperature thermistor abnormality. (CN14)
Alarm stop reason
Thermistor for detection of
water return header temperature
indicates an abnormal value.
Replace thermistor
Revise connections
Replace PCBc
(CPU PCB)
Yes
Yes
No
No
Remove the
connectors and
measure thermistor resistance.
Is resistance value
normal?
The connection and
insertion of connector
CN14 on PCBc (CPU PCB)
are correct