Service Manual
Installation and Maintenance
45
9.Maintenance
9.1 Error Code
NO.
Malfunction
name
Display on dual-
8 nixie tube
A/C Status
Possible reasons
Solution
1
Malfunction
of indoor
ambient
temperature
sensor
F1
Indoor fan runs according to set fan
and other loads will stop.
1. The wiring terminal between indoor
ambient temperature sensor and
controller is loosened or poorly contacted;
2. There’s short circuit due to trip-over of
the parts on controller;
3.Indoor ambient temperature sensor is
damaged (Please check it by referring
to the resistance table for temperature
sensor)
4. Main board is broken.
Refer to
maintenance
flowchart.
2
Malfunction
of indoor tube
temperature
sensor
F2
Indoor fan runs according to set fan
and other loads will stop.
1. The wiring terminal between indoor
tube temperature sensor and controller is
loosened or poorly contacted;
2. There’s short circuit due to trip-over of
the parts on controller;
3.indoor tube temperature sensor is
damaged (Please check it by referring
to the resistance table for temperature
sensor)
4. Main board is broken.
Refer to
maintenance
flowchart.
3
Malfunction of
outdoor tube
temperature
sensor
F4
Indoor fan runs according to set fan
and other loads will stop.
1. The wiring terminal between outdoor
tube temperature sensor and controller is
loosened or poorly contacted;
2. There’s short circuit due to trip-over of
the parts on controller;
3.indoor tube temperature sensor is
damaged (Please check it by referring
to the resistance table for temperature
sensor)
4. Main board is broken.
Refer to
maintenance
flowchart.
4
Insufficient
fluorine
protection
F0
Indoor fan runs according to set fan
and other loads will stop.
1. Heat exchangers are too dirty or the air
inlet/outlet is blocked.
2. Compressor doesn't work normally.
Strange noise or leakage occurs.
Temperature of the shell is too high.
3. System is blocked inside(dirt block, ice
block, oil block, Y-valve not fully open).
4. The refrigerant is leaking.
Refer to
maintenance
flowchart.
5
Overload
protection for
compressor
H3
Indoor fan runs according to set fan
and other loads will stop.
1. Heat exchangers are too dirty or the air
inlet/outlet is blocked.
2. Fan motor doesn't work at a normal
fan speed; fan speed is too low or the fan
doesn't run.
3. Compressor doesn't work normally.
Strange noise or leakage occurs.
Temperature of the shell is too high.
4. System is blocked inside(dirt block, ice
block, oil block, Y-valve not fully open).
5. Draw-water motor can't operate
normally.
6. Water outlet hasn't been blocked well
by rubber cork .
7. The refrigerant is leaking and cause
overheating protection to compressor.
Refer to
maintenance
flowchart.
