Haier 2U14CS4ERA, Service Manual

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light should be off for 5 seconds.
b) For the units’ malfunctions Annex 1
If there’s malfunction with the units, this will not affect the run of the complete appliance, but this
can be displayed by the malfunction light, the light flashing frequency is 0.5HZ, the number of
times is according to the malfunction table of the indoor units. When a round of flashing is
finished, the light should be off for 10 seconds. Then report according to the order : unit A
unit B
unit C unit D, that is, if there’s malfunction with several units, then just report the indoor unit
with the highest priority level. Among the unit malfunctions, the priority level of the
communication malfunction is the highest, for others, that appears first will have the priority.
Remarks: in 3 minutes when the compressor stops, the units’ malfunctions are not displayed;
the complete appliance’s malfunctions are prior to the units’ malfunctions.
Annex 1 Malfunction codes of the out unit
Remarks: under the mode of refrigeration, the malfunctions of each unit’s thin pipe temperature
sensor are not reported, under the mode of heating, the malfunctions of each unit’s thick pipe
temperature sensor are not reported.
F12 1 Outdoor EEPROM error
F1
2
The protection of IPM
F22 3 Overcurrent protection of AC electricity for the outdoor model
F3 4 Communication fault between the IPM and outdoor PCB
F19 6 Power voltage is too high or low
F4 8 Overheat protection for Discharge temperature
F21 10 Defrost temperature sensor failure
F6 12 Ambient temperature sensor failure
F25 13 Discharge temperature sensor failure
E7 15 Communication fault between indoor and outdoor units
F11 18 deviate from the normal for the compressor
---- 19 Loop of the station detect error
E9 21 High work-intense protection
--- 24 Overcurrent of the compressor
--- 25 Overcurrent protection for single-phase of the compressor
---- 36 The socket protect
Outdoor Unit
Ambient Sensor, Defrost Sensor, Pipe sensor
R25 =10K 3% B25 /50 =3700K 3%
Temp.( ) Max.(K Ω ) Normal(K Ω ) Min.(K Ω ) Tolerance( )
-30 165.2170 147.9497 132.3678 -1.94 1.75
-29 155.5754 139.5600 125.0806 -1.93 1.74
-28 146.5609 131.7022 118.2434 -1.91 1.73
Functions and Control
Domestic air conditioner
7.2 Value of thermistor
21