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Maintenance
Service Manual
9. Maintenance
9.1 Error Code
NO. Malfunction
Name
Display Method of Indoor Unit
A/C Status Possible Causes
Error
Code
Indicator lamp
(During blinking, ON for 0.5S and
OFF for 0.5 S)
Operation
Inidicato
COOL
Indicator
HEAT
Indicator
1
Indoor
ambient
temperature
sensor is
open/short-
circuited
F1
OFF 3S
and blinks
once
Compressor and
draw water motor
stop operation. Fan
operates at set fan
speed.
1. The wiring terminal between indoor
ambient temperature sensor and main
board is loosened or poorly contacted.
2. Theres short circuit due to trip-over of the
parts on main board.
3.Indoor ambient temperature sensor is
damaged (Please check it by referring to the
resistance table for temperature sensor).
4. Main board is damaged.
2
Indoor
evaporator
temperature
sensor is
open/short-
circuited
F2
OFF 3S
and blinks
twice
Compressor and
draw water motor
stop operation. Fan
operates at set fan
speed.
1. The wiring terminal between indoor
evaporator temperature sensor and main
board is loosened or poorly contacted.
2. Theres short circuit due to the trip-over of
the parts on main board.
3.Indoor evaporator temperature sensor is
damaged (Please check it by referring to the
resistance table for temperature sensor).
4. Main board is damaged.
3
Outdoor
condenser
temperature
sensor is
open/short-
circuited
F4
OFF 3S
and blinks
4 times
Compressor and
draw water motor
stop operation. Fan
operates at set fan
speed.
1. The wiring terminal between outdoor
condenser temperature sensor and main
board is loosened or poorly contacted.
2. Theres short circuit due to the trip-over of
the parts on main board.
3. Outdoor condenser temperature sensor is
damaged (Please check it by referring to the
resistance table for temperature sensor).
4. Main board is damaged.
4
Overcurrent
protection
E5
Disconnect power, and then turn on the unit
again after 10min. If "E5" still exits, please
contact professional person to maintain the
unit.
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