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9. Maintenance
9.1 Error Code List
No.
Malfunction Name
Indoor ambient
1
temperature sensor is
open/short- circuited
Indoor evaporator
2
temperature sensor is
open/short-circuited
Blocked protection of
3
IDU fan motor
Malfunction protection
4
of jumper cap
Zero-crossing
inspection circuit
5
malfunction of the IDU
fan motor
Outdoor ambient
6
temperature sensor is
open/short-circuited
Outdoor condenser
7
temperature sensor is
open/short-circuited
48
Display Method of
Indoor Unit
Dual-8 Code
Display
The unit will stop operation as it reaches
the temperature point. During cooling
and drying operation, except indoor
F1
fan operates, other loads （such as
compressor, outdoor fan, 4-way valve）
stop operation; During heating operation,
the complete unit stops operation.
The unit will stop operation as it reaches
the temperature point. During cooling
and drying operation, except indoor fan
F2
operates, other loads stop operation;
During heating operation, the complete unit
stops operation.
IDU fan, ODU fan, compressor and electric
H6
heat tube stop operation. Horizontal louver
stops at the current position.
Operation of remote controller or control
C5
panel is available, but the unit won't act.
Operation of remote controller or control
U8
panel is available, but the unit won't act.
The unit will stop operation as it reaches
the temperature point. During cooling
and drying operation, compressor stops
F3
and indoor fan operates; During heating
operation, the complete unit stops
operation.
The unit will stop operation as it reaches
the temperature point. During cooling
and drying operation, compressor stops
F4
and indoor fan operates; During heating
operation, the complete unit stops
operation.
A/C status
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.
1. The wiring terminal between indoor
evaporator temperature sensor and
controller is loosened or poorly contacted;
2. There's short circuit due to the trip-over
of the parts on controller;
3.Indoor evaporator temperature sensor is
damaged (Please check it by referring to
the resistance table for temperature sensor)
4. Main board is broken.
1. The feedback terminal of PG motor is
not connected tightly.
2. The control terminal of PG motor is not
connected tightly.
3. Fan blade rotates unsmoothly.
4. Malfunction of motor
5. Main board is broken.
1. There's not jumper cap on the main
board.
2. Jumper cap is not inserted properly and
tightly.
3. Jumper cap is damaged.
4. Controller is damaged.
1. Quick de-energization and energization.
Wrong judgement by the controller
because the electric-discharging of
capacitor is slow.
2. Zero-crossing inspection circuit of main
board for controller is abnormal.
1. The wiring terminal between outdoor
ambient temperature sensor and controller
is loosened or poorly contacted;
2. There's short circuit due to the trip-over
of the parts on controller;
3.Outdoor ambient temperature sensor is
damaged (Please check it by referring to
the resistance table for temperature sensor)
4. Main board is broken.
1. The wiring terminal between outdoor
condenser temperature sensor and
controller is loosened or poorly contacted;
2. There's short circuit due to the trip-over
of the parts on controller;
3.Outdoor condenser temperature sensor
is damaged (Please check it by referring to
the resistance table for temperature sensor)
4. Main board is broken.
Service Manual
Possible Causes
Installation and Maintenance
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Table of Contents
Troubleshooting
