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[ IX Troubleshooting ]
- 246 -
HWE09080 GB
1. Error Code
<Transmission power supply fault error detail FF (Heat source unit)>
2. Error definition and error detection method
Transmission power output failure
3. Cause
1) Wiring failure
2) Transmission power supply cannot output voltage because overcurrent was detected.
3) Voltage cannot be output due to transmission power supply problem.
4) Transmission voltage detection circuit failure
4. Check method and remedy
Check the items in IX [4] -7- (2) Troubleshooting transmission power circuit of heat source unit on all heat source units in the
same refrigerant circuit.
<Transmission power supply fault other than error detail code FF (Heat source unit)>
2. Error definition and error detection method
Transmission power reception failure
3. Cause
One of the heat source units stopped supplying power, but no other heat source units start supplying power.
4. Check method and remedy
Check the items in IX [4] -7- (2) Troubleshooting transmission power circuit of heat source unit on all heat source units in the
same refrigerant circuit.
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