187
TROUBLESHOOTING
6) Over Speed
For diagnosis and repair, Refer to P306 and after, [Wiring Diagram of the Outdoor Unit] or Refer to P233 and after, [Board Main-
tenance Functions].
7) High Pressure Abnormality in Cooling Operation
For diagnosis and repair, Refer to P306 and after, [Wiring Diagram of the Outdoor Unit] or Refer to P233 and after, [Board Main-
tenance Functions].
Problem Possible Cause Specific Example Inspection and Treatment
P8 (82) error
Engine system
failure
Gas mixer operation
failure
Engine throttle valve failure
Refer to P210, 16)Inspect En-
gine Throttle Valve / Fuel Gas
Flow Control Valve
Stuck engine throttle valve
Fuel gas flow control valve
failure
Output failure
Problem Possible Cause Specific Example Inspection and Treatment
E3 (86) error
H3 (76) error
JA (73) error
Heat exchange at
the condenser
(outdoor unit
side) is disturbed.
Outdoor fan motor
operation failure
Obstacle (contact with other
objects)
Clean up obstacle
Outdoor fan motor failure
Refer to P217, 27)Inspect Out-
door Fan Motor
Output failure
Deteriorated heat
exchange capacity
Clogged heat exchanger fins
/ obstacle
Clean heat exchanger fins
Intake air tempera-
ture is too high
Environmental / installation
conditions are severe
Check and improvement of envi-
ronmental conditions
Short circuit, etc.
Refrigerant
system failure
Inappropriate refriger-
ant amount
Overfilling
Refer to P222, 36)Inspect Refrig-
erant Pressure (Inspect Refriger-
ant Amount)
Blockage in the refrig-
erant flow path
Blockage in the check valve
Refer to P222, 37)Inspection
Check Valve (Refrigerant Pres-
sure Increase)
Clogged or broken pipe Correct faulty parts
Stop valve operation failure
(not fully opened)
Check if stop valve is fully opened
Blockage in the strainer
Refer to P224, 44)Inspect Strain-
er
Non-condensable gas incorporation into the refriger-
ant system
Replace refrigerant
Sensor/Harness
system failure
Refrigerant high
pressure switch
malfunction
Refrigerant high pressure
switch failure
Refer to P222, 38)Inspect Refrig-
erant High Pressure Switch
Contact failure / disconnec-
tion
Refrigerant high
pressure sensor
operation failure
Refrigerant high pressure
sensor failure
Refer to P223, 39)Inspect Refrig-
erant High Pressure Sensor
Contact failure / disconnec-
tion
Gas mixer
operation failure
Engine throttle valve failure
Refer to P210, 16)Inspect Engine
Throttle Valve / Fuel Gas Flow
Control Valve
Stuck engine throttle valve
Fuel gas flow control valve failure
Output failure
To Next Page
Loading...
Need help?
General