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I/F P.C. board trouble
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[A31]
Is there any trouble
of H-HWM power supply?
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Indoor other trouble
(H-HWM)
[F29]
Check the defect in I/F P.C. board of H-HWM. (Failure EEPROM)
Failure → Replace
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NO
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1. H-HWM power trouble (Voltage, noise, etc.)
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Check power voltage and
YES
Correct power line.
Check external noise, etc.
Check I/F P.C. board of
Failure → Replace.
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Indoor P.C. board trouble
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H-HWM.
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Table of Contents
Troubleshooting
