43
Installation and Maintenance
Service Manual
Malfunction of phase
current detection
circuit for compressor
U1
During cooling and drying operation,
compressor will stop while indoor fan will
operate; During heating operation, the
complete unit will stop
Replace outdoor control panel AP1
Malfunction of voltage
dropping for DC
busbar
U3
During cooling and drying operation,
compressor will stop while indoor fan will
operate; During heating operation, the
complete unit will stop
Supply voltage is unstable
Malfunction of
complete units current
detection
U5
During cooling and drying operation, the
compressor will stop while indoor fan will
operate; During heating operating, the
complete unit will stop operation.
Theres circuit malfunction on outdoor units control panel
AP1, please replace the outdoor units control panel AP1.
Cold air prevention
protection
E9
Not the error code. It’s the status code for the operation.
Refrigerant recovery
mode
Fo
Refrigerant recovery. The Serviceman operates it for
maintenance.
Malfunction of
detecting plate(WIFI)
JF
Loads operate normally, while the unit
can’t be normally controlled by APP.
1.Main board of indoor unit is damaged;
2.Detection board is damaged;
3.The connection between indoor unit and detection board is
not good;
Undefined outdoor unit
error
oE
Cool: compressor and outdoor fan stops
operation, while indoor fan operates; Heat:
compressor, outdoor fan and indoor fan
stop operation.
1. Outdoor ambient temperature exceeds the operation range
of unit (eg: less than- 20
o
C or more than 60
o
C for cooling;
more than 30
o
C for heating);
2. Failure startup of compressor?
3. Are wires of compressor not connected tightly?
4. Is compressor damaged?
5. Is main board damaged?
