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TROUBLESHOOTING
10) If Tank Water Heater has trouble
Bad contact of connector/
insert correctly
1) Wire connector
2) Replace Heater
Is MAIN PCB connector
(CN79) inserted correctly?
Is Tank Water Heater
normal?(about72ohm)
Is the input voltage of
IC01 MICOM #6 normal?)
Start
NO
YES
YES
YES
NO
1) Recheck the wire
2) Replace PCB MAIN
NO
Normal(recheck)
Measure the resistance between
#6~#10 after CN79 connector
open 72ohm 7%
ERROR Code
Checking method of Tank Water Heater
resistance CN79#6(Pink) #10(White)
** : Open(wire disconnection, heater
disconnection) trouble 0: Short trouble
Checking method of Tank Water Heater
resistance CN78#5(Black) #4(Brown)
** : Open(wire disconnection, heater
disconnection) trouble 0: Short trouble
Start
YES
YES
YES
Initial
power On
Heater off
Working
heater
3.5V~4.8V
MICOM
#6
3.5V~4.8V
0V