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[ IX Troubleshooting ]
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HWE09080 GB
1) BC controller: Phenomena when the pressure sensor is connected wrongly (reverse connection of P1 and P3) to the board.
2) Check the self-diagnosis switch (Heat source control board SW1).
3) Check whether CNP1 (liquid side) connector on the BC controller control board and the connector CNP2 (intermediate part)
are not disconnected or not loose.
4) Check the pressure value on the self-diagnosis switch (same as note 2) with the connector of the applied pressure sensor is
disconnected from the board.
Cooling-only Heating only
Heating main
Non-cooling
Indoor heating SC small
Heating indoor Thermo ON
Especially noise is large.
Indoor heating SC small
Heating indoor Thermo ON
Especially noise is large.
Cooling-main
Symptoms
SC11 large
SC16 small
PHM large
SC11 large
SC16 small
PHM large
Non-cooling Normal
SC11 large
SC16 small
PHM large
Measurement data SW1 setting value
Heat source high pressure
Heat source low pressure
BC controller pressure
(liquid side)
BC controller pressure
(intermediate part)
Symbol
63HS1
PS1
63LS
PS3
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON