14
TROUBLESHOOTING
P13/H3
(
High pressure abnormal error(In heating mode)
)
Diagnosis
Handling
P14
(High compression ratio protection)
Diagnosis
Handling
P15
(Low compression ratio protection)
Diagnosis
Handling
Check if the liquid side of
outdoor system is blocked
Remove dirty and keep it unobstructed
Check if there is too much
Air or N2 in the system
No
Discharge the refrigerant,
vacuum, recharge refrigerant
Yes
Power off and re-power on
to see whether it is normal
If there is still abnormal
replace the mainboard
No
Yes
Yes
Check if the refrigerant is lack
or
the
refrigerant
is
No
Charge some refrigerant into the system
Yes
Check if there is too much
Air or N2 in the system
Discharge the refrigerant,
vacuum, recharge refrigerant
Power off and re-power on to
see whether it is normal
Check if the throttle part of
the system is blocked
Remove dirty and keep it unobstructed
If there is still abnormal
replace the mainboard
No
No
Yes
Yes
Yes
Yes
Power off and re-power on
to see whether it is normal
No
If there is still abnormal
replace the mainboard
Check if the throttle part of
the system is blocked
Remove dirty and keep it unobstructed
