75
TROUBLESHOOTING
11) If Tank Water Heater has trouble
1) Wire connector
2) Replace Heater
Is MAIN PCB connector
(CN79) inserted correctly?
Is the input voltage of
IC01 MICOM #6 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 ⑥(3)-⑩(7) after
CN79 connector open 72ohm ± 7%
ERROR Code
☞ Checking method of Tank Water Heater
resistance CN79#6(Pink) ↔ #10(White)
** ∞Ω: Open(wire disconnection, heater
disconnection) trouble / 0Ω: Short trouble
Start
YES
YES
YES
Initial
power On
Heater off
Working
heater
3.5V ~
4.8V
MICOM
#6
condition
3.5V ~
4.8V
0V
Is Tank Water Heater
normal?(about72ohm)
※ It could changed HEATER capacity by operation
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