II - 47
System L (settings trouble)
Outdoor
unit control
board
display
Contents
Outdoor
unit control
board
display
Contents
Mismatch of indoor/outdoor unit types
(Non-GHP device present)
Indoor unit capacity not set
Outdoor unit capacity not set
Multiple master units set for group control
Indoor unit type setting failure
Duplicate system address settings
Indoor unit pairing trouble
Duplicate indoor unit priority settings
(priority indoor unit)
Water heat exchanger unit setting failure
Mismatch in outdoor units
Duplicate indoor unit priority settings
(other than priority indoor unit)
Water heat exchanger unit parallel address
duplication
Group control cable present for individual-
control indoor unit
Gas type setting failure
Indoor unit address not set
System P (activation of indoor/outdoor protection devices)
Outdoor
unit control
board
display
Contents
Outdoor
unit control
board
display
Contents
Indoor unit fan trouble
O
2
sensor failure
Compressor discharge temp. high
Refrigerant gas completely absent
Refrigerant high-pressure switch activated
Bypass valve failure
Power phases reversed (open phase)
4-way valve lock trouble
Indoor unit ceiling panel connector connection
failure
Refrigerant pressure too high
Indoor unit
fl
oat switch trouble
Outdoor unit fan (inverter) trouble
Water heat exchanger unit freezing trouble
Water heat exchanger unit interlock trouble
Indoor unit DC fan trouble
Clutch connection trouble
Refrigerant circuit failure
Group control trouble
Other
Outdoor unit
control board
display
Contents
Group slave unit trouble (trouble detected by system controller)
Oil change time warning (
appears on the Remote Controller)
Defrosting fault alarm
High power backup operation
Compressor oil empty
Trouble with temp. sensor for oil level measurement
If the system does not operate normally after the above causes of trouble have been corrected, or if any display other
than the above appears on the remote controller display, refer to the “Failure Diagnosis Section” in the separate
<Technical Service Materials>.
During a remote controller test run,
is not detected.
Some of the displays may not appear depending on the model type.
W̲02̲46-47.indd 47
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2012/05/22 11:26:04
2012/05/22 11:26:04
