Check
code
Outdoor
LED display
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[4-way valve inverse error]
[P19]
Is operation of 4-way valve
correct?
(Check pipe temp. and etc. in
cooling/heating operation.)
NO
Are temperature sensors
correct?
TE sensor: GM56, 80 : CN603
GM110, 140 : CN605
TS sensor: GM56, 80 : CN603
GM110, 140 : CN604
NO
YES
YES
NO
YES
Are resistance value of
indoor TC and TCJ
sensors correct?
Check and
replace of PMV
Replace TE sensor.
Replace TS sensor.
Replace coil
of 4-way valve.
Replace TC sensor
Replace TCJ sensor
Is the 4-way valve
coil is normal?
(Check the resistance value
of 4-way valve coil)
Does power supply to
4-way valve coil when
4-way valve is operated?
Check outdoor
P.C. board.
Check indoor P.C. board.
Defect → Replace
Check 4-way valve.
Defect → Replace
Check outdoor
P.C. board.
Defect → Replace
NO
YES
OK
Error
YES
NO
NO
Is refrigerant flow by
PMV correct?
YES
4-way valve maintenance check operation (SW01 and SW02
operations)
You can confirm 4-way valve operation by handling service switches
SW01 and SW02. Use this method to check whether there is trouble or
not on the 4-way valve.
[Method]
(1) Check D800 to D804 are turned off (or rapid flashing) and D805 is
turned on. When D800 to D804 flash slowly or D805 flashes, push
and hold SW01 and SW02 for 5 seconds or more simultaneously.
In the result, D800 to D804 are turned off (or rapid flashing) and D805
changes from flashing to lighting.
(2) Push and hold SW01 for 5 seconds or more. D804 changes to slow
flashing.
(3) Push SW01 several time and stop it at LED display of the following
“Self-preservation valve operation”
Self-preservation valve
suck operation
D800 D801 D802 D803 D804
○●○○◎
GM56, 80: switch to cooling cycle
This function is operated only by ten
seconds, and turned off afterwards.
GM110, 140: switch to heating cycle
This function is operated only by ten
seconds, and turned off afterwards.
Self-preservation valve
secession operation
D800 D801 D802 D803 D804
●○○○◎
GM56, 80: switch to heating cycle
This function is operated only by ten
seconds, and turned off afterwards.
GM110, 140: switch to cooling cycle
This function is operated only by ten
seconds, and turned off afterwards.
○ : ON, ● : OFF, ◎: Rapid flashing (5 times/second)
(4) Push SW02 and then stop it at LED display of D805 flashes rapidly.
(5) Push and hold SW02 for 5 seconds or more. In the result, D804
changes to slow flashing, D805 changes to lighting and the 4-way
valve is operated.
* If an unknown point generated on the way of the operation, push and
hold SW01 and SW02 for 5 seconds or more simultaneously. You can
return to the item (1).
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