Mr. Slim Air Conditioner Error Codes

P1 Intake sensor error
P2 P9 Pipe (Liquid or 2-phase pipe) sensor error E6 E7 Indoor/outdoor unit communication error
P4 Drain sensor error
P5 Drain pump error
PA Forced compressor error
P6 Freezing/Overheating safeguard operation
EE Communication error between indoor and outdoor units
P8 Pipe temperature error
E4 Remote controller signal receiving error
Fb Indoor unit control system error (memory error, etc.)
E0 E3 Remote controller transmission error
E1 E2 Remote controller control board error

For details, check the LED display of the outdoor controller board.

E9 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
UP Compressor overcurrent interruption
U3, U4 Open/short of outdoor unit thermistors
UF Compressor overcurrent interruption (When compressor locked)
U2 Abnormal high discharging temperature/49C worked/insufficient refrigerant
U1 Ud Abnormal high pressure (63H worked)/Overheating safeguard operation
U5 Abnormal temperature of heat sink
U8 Outdoor unit fan safeguard stop
U6 Compressor overcurrent interruption/Abnormal of power module
U7 Abnormality of super heat due to low discharge temperature
U9 UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/ Current sensor error.


05 Can not receive signals for 35 seconds (if communications have recovered)
35 Cooling high pressure control
36 Compressor overheat (115˚C)
37 Outdoor heat exchanger sensor is abnormal
38 Outdoor air temperature sensor is abnormal
39 Discharge pipe sensor is abnormal (anomalous stop)
42 Current cut
47 Active filter voltage error
48 Outdoor unit’s fan motor is abnormal
51 Short circuit in the power transistor (high side)Current cut circuit breakdown
57 Refrigeration cycle system protective control
58 Current safe
59 Compressor wiring is unconnection Voltage drop-Low speed protective control
60 Rotor lock
61 Connection lines between the indoor and outdoor units are faulty
62 Serial transmission error
80 Indoor unit’s fan motor is abnormal
82 Indoor heat exchanger sensor is abnormal (anomalous stop)
84 Anti-condensation control
85 Anti-frost control
86 Heating high pressure control

Others Other errors (Refer to the technical manual for the outdoor unit.)

List of error codes and stop codes (for all models)


Pdf -1

Pdf -2

Pdf -3


One Response to Mr. Slim Air Conditioner Error Codes

  1. Harry Wilcock says:

    Error code flashing on wall control 35
    Mr Slim Model PUH-3YKA
    R22 refrigerant charge appears Ok (eg Pres temp corresponds enough to what should make run comp at least to start up)
    No comp start up tho at all.
    FCU runs n filter clean.
    Outdoor unit appears in good condition with no corrosion.

    Any Techs out there have any idea or where to go from here.
    Would be much appreciated as single mum with little funds n hot Christmas looming.
    Any help appreciated!

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