Multi F Four-Way Ceiling Cassette Service Manual

Part 5. Trouble Shooting
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Only for training and service purposes
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Display
code
Title Cause of error Check point & Normal condition
43
Sensor error of high
pressure
Abnormal value of sensor
(Open/Short)
• Bad connection of connector PCB
• Bad connection high pressure connector
• Defect of high pressure connector (Open/Short)
• Defect of connector PCB (Open/Short)
• Defect of outdoor main PCB.
Is sensor connected
to PCB correctly?
Connect sensor to PCB correctly
Replace corresponding
pressure sensor
Yes
No
No
Yes
END
After replacement of outdoor
unit main PCB is the system
also abnormal?