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'15 • HM-T-246
Error code
Remote control:
LED Green Red
Heat pump
water heater
Keep
flashing
Stay off
Content
4.3 Troubleshooting
P ower source anomaly
5. Troubleshooting
Diagnosis Countermeasure
Is there no
loose connection of
wiring harness for remote
control?
YES
Disconnect the wiring harness
Is there no
disconnection or short circuit
of wiring harness for
remote control?
NO
NO
Is the voltage
between X and Y terminals
of heat pump water heater DC15V or
higher?
NO
Is thevoltage
between ① and ② of CN18V
on the control PCB
DC18V?
YES
YES
YES
NO
Correct it
2. E rror detection method
Condition of error displayed
• Disconnection or short circuit
of remote control wiring
harness
• Malfunction by noise
• P ower P CB anomaly
• Disconnection of wiring
harness
• Control P CB anomaly
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