38MBR: Service Manual
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41
J6 Malfunction
Troubleshooting
Error Code
J6/P6
Malfunction decision conditions
If the sampling voltage is not 5V, the LED displays a failure code.
Supposed Causes
• Faulty wiring
• Faulty overload protector
• System blockage
• Faulty outdoor PCB
J6 displayed
Low pressure protec
Ɵ
on
Are the low pressure
switch and main control
board wired correctly
?
Yes
Connect the low pressure
protector and main control
board.
No
Is the low pressure
protector broken
?
Yes
Method
: Disconnect the plug.
Measure the low pressure
protector resistance. If the
protector is normal, the value is
0. Does the problem s
Ɵůů
exist
?
Replace the high pressure
protector.
No
Is the outdoor ambient
temperature too low
?
Stop the unit.
Yes
Is the core value of the
high pressure valve
opened fully
?
No
Open the valve core of the
high pressure valve.
No
Is the indoor fan
running properly in the
COOLING mode
?
Yes
Refer to the Fan Speed Out of
Control Malfunc
Ɵ
on solu
Ɵ
on.
Iden
Ɵ
fy the cause and resolve.
No
Yes
No
Check whether the refrigerant
system is func
Ɵ
oning properly.
Replace the
outdoor main
board.
Is the problem
resolved
?
When the refrigerant level is not
su
ĸ
cient, does the system
func
Ɵ
on properly a
Ō
er more
refrigerant is added
?
No
