69
TROUBLESHOOTING
10) If Tank Water Heater has trouble
Replace Tank Water Heater
Is Tank Water Heater
normal?(about48ohm)
Is MAIN PCB connector
(CN78) inserted correctly?
Is the input voltage of
IC01 MICOM #8 normal?
Start
NO
YES
YES
YES
Bad contact of connector/ insert correctly
NO
1) Recheck the wire
2) Replace PCB MAIN
NO
Normal(recheck)
Measure the resistance
between - after
CN78 connector open 48ohm 7%
ERROR Code
Checking method of Tank Water Heater
resistance CN78#5(Black) #4(Brown)
** : Open(wire disconnection, heater
disconnection) trouble 0 : Short trouble
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