Whether there is a fault in the indoor and outdoor units can be known by the access code of the remote control, the content of the green LED (power indicator and microcomputer normal indicator) or the red LED (check indicator) of the indoor/outdoor unit.
Figure 1: Mitsubishi Heavy Industries' Haier air conditioner.
(Go to Okmarts and pick the Mitsubishi Heavy Industries Compressor you need)
E1: Operating switch wire broken, air inside the machine circuit board is bad.
E2: empty inside position number repeated / empty inside board bad.
E3: no corresponding outdoor unit number inside and outside signal line broken.
E4: indoor unit number set incorrectly (set 48 or 49).
E5: Abnormal communication between inside and outside. E5: Communication between inside and outside is abnormal.
E6: The indoor unit heat exchanger thermistor is bad, and the internal board is bad.
E7: Bad indoor unit suction resistor, bad internal board.
E8: High temperature of heat exchanger of indoor unit (heating), short circuit of heat exchanger thermistor of inner unit.
E10: Too many times when operating the switch multiple control.
E31: Duplicate outdoor unit number, bad external board.
E32: Inverted phase into missing phase, bad external unit board.
E33: Compressor overcurrent. E33: Compressor overcurrent.
E34: The primary of 52C is missing T phase.
E35: Outer unit temperature is too high, short circuit of outside thermistor, short circuit of outside unit.
E36: Compressor outlet cold pipe temperature is too high.
E38: Thermistor of outdoor unit temperature is bad'.
E39: compressor outlet cold tube temperature thermistor is bad.
E40: Compressor high pressure is too high.
uA: Outdoor and indoor units do not match or have different serial numbers.
uf: Circuit receiving head is faulty.
Figure 2: Mitsubishi Heavy Industries' Haier air conditioner General failure
Detection light (yellow) |
Detection light (green) |
Line controller display code |
Cause of failure |
Flashing 3 times |
|
E1 |
Line controller and indoor unit communication failure |
Flashing 3 times |
|
E5 |
Poor communication inside and outside the prion |
Flashing 1 times |
|
E6 |
Indoor coil inlet T2 fault |
Flashing 1 times |
|
E6 |
Indoor coil middle T3 fault |
Flashing 1 times |
|
E6 |
Indoor coil outlet T4 fault |
Flashing 2 times |
|
E7 |
Room temperature T1 fault |
Flashing 6 times |
|
E8 |
Heating room exceeds load |
Flashing 4 times |
|
E9 |
Water full, defective drain pump |
Flashing 1 times |
|
E28 |
Line controller, temperature sensor fault |
|
Flashing 7 times |
E32 |
Outdoor phase sequence fault |
|
Flashing 7 times |
E33 |
Outdoor overcurrent fault |
|
Flashing 4 times |
E40 |
Air outside exhaust temperature abnormal DLT red zone |
|
Flashing 1 times |
E37 |
Outdoor coil inlet T6 fault |
|
Flashing 1 times |
E37 |
Outdoor check pipe middle 17 fault |
|
Flashing 1 times |
E37 |
Outdoor coil outlet fault |
|
Flashing 2 times |
E38 |
Outdoor ambient temperature T5 fault |
|
Flashing 4 times |
E39 |
Outdoor exhaust temperature sensor disconnection |
|
Flashing 5 times |
E40 |
Outdoor high pressure fault |
|
Flashing 5 times |
E57 |
Outdoor low pressure fault |
|
Flashing all the time |
— |
Operating mode conflict between indoor units |
Mitsubishi Heavy Industries Haier air conditioning display E57 more accurately explained should be, serious imbalance, high pressure is too low to cause a serious drop in flow (capillary fixed throttling);
press unloading (but running). E2: indoor unit evaporator anti-freeze protection.
Figure 3: fault code E*
Figure 4: fault code E*
Figure 5: fault code E*
the first step to determine whether it is a control failure or system failure, you can first take out the indoor tube temperature package from the evaporator, if it does not appear, it means that it is a system problem; the second step to check whether the indoor ambient temperature is too low, whether the indoor fan speed is too low, whether the indoor evaporator is too dirty, and whether the system is blocked. The cause of its frost may be: 1) system fluoride deficiency, available pressure gauge to measure the system pressure, using a clamp meter.
Mitsubishi Heavy Industries Haier air conditioner display e57 fault code, what is the reason? ...
Fault content: indoor unit and outdoor unit communication failure
Cause of failure.
1, check whether the pins are loose poor contact or broken wire.
2, check whether the internal machine control circuit board is normal.
3, check whether the external machine control circuit board is faulty.
4, check whether the main control circuit board is faulty.
05/11/2022
Whether there is a fault in the indoor and outdoor units can be known by the access code of the remote control, the content of the green LED
05/10/2022
Programmable logic controller (PLC) is a digital operation electronic system specially designed for application in industrial environment.
05/09/2022
Detection method: First, measure its make-break with a multimeter. If the resistance value approaches zero or infinity, it indicates that the coil is short circuited or open circuited.
05/09/2022
Before removing the valve body from the bottom of the transmission, take extra care when removing the flat wire of the external solenoid valve.
05/06/2022
When the power is on, the electromagnetic coil generates electromagnetic force to lift the closing part from the valve seat and open the valve
05/05/2022
Solenoid valve is one of the commonly used valves in automatic control system. It is favored by users because of its low price, simple use, convenience and reliability.
05/04/2022
Solenoid valve is an industrial equipment controlled by electromagnetism. It is an automatic basic element used to control fluid. It belongs to actuator and is not limited to hydraulic and pneumatic.
05/03/2022
Cause: The short-circuit ring of AC contactor is broken or the end faces of dynamic iron cores and static iron cores are uneven; Skewed or dirty.
05/02/2022
The working principle of DC contactor is similar to that of AC contactor. They all make the main contact on or off through the actuation of electromagnetic coil.
05/01/2022
Surge protector is composed of five parts: discharge gap, discharge tube, varistor, suppression diode and choke coil which includes at least one nonlinear voltage limiting element.
IWAYA DENKI Water Pump 25CJT0752
Panasonic Servo Motor MHMF022L1V2M
Honeywell Solenoid Valve VE4025B1045
ROTEN Mechanical Seal 8E5K-22-X
Autonics Rotary Encoder E50S8-1024-6-L-5
SUMTAK Encoder IRS360-2000-005