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TROUBLESHOOTING
10) If Tank Water Heater has trouble
ERROR Code
2¢ (-19¡ ) is recommended
Measure the resistance
between - after
CN78 connector open 48ohm
Checking method of Tank Water Heater
resistance CN78#5(Black)
**
: Open(wire disconnection, heater
disconnection) trouble 0 : Short trouble
38¢ (3¡ ) is recommended
Is Tank Water Heater
normal?(about48ohm)
7%
Is MAIN PCB connector
(CN78) inserted correctly?
Is the input voltage of
IC01 MICOM #8 normal?
Normal(recheck)
#4(Brown)
69
Start
Start
NO
YES
YES
NO
Bad contact of connector/ insert correctly
YES
YES
NO
YES
YES
Replace Tank Water Heater
1) Recheck the wire
2) Replace PCB MAIN
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