Midea MPK-10ER - 2.3 TROUBLESHOOTING GUIDE

GD Midea Refrigeration Equipment Co. Ltd Service manual for K portable Series
5
2.2.10.1 The maximum length of Timer is 24
hours and the minimum is 0.5 hours.
2.2.10.2 TIMER ON function: first turn OFF the
unit, the unit will be automatically ON at the
set time.
2.2.10.3 TIMER OFF function: first turn ON the
unit, the unit will be automatically OFF at the
set time.
2.2.10.4 TIMER ON/OFF function (ON TIMER is
earlier than OFF TIMER): first turn OFF the
unit, it will be automatically ON at set time,
and later be OFF at the set time.
2.2.10.5 TIMER OFF/ON function (OFF TIMER is
earlier than ON TIMER): first turn ON the unit,
it will be automatically OFF at set time, and
later be ON at the set time.
2.2.10.6 Timer function execution is applicable
upon one operation only.
2.2.10.7 Timer precision is less than 15 minutes.
2.2.11 Auto restart function
In case of a sudden power failure, this
function automatically sets the unit to
previous settings before the power failure
when power returns.
2.3 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in three kinds. One is called Starting Failure which is caused
from an electrical defect, another is ineffective Air Conditioning caused by a defect in the refrigeration circuit
and improper application, and the other is called the Structure Damage.
ROOM AIRCONDITIONER VOLTAGE LIMITS:
NAMEPLATE RATING MINIMUM MAXIMUM
220~240V
115V
196V
103V
253V
122V
PROBLEM POSSIBLE CAUSE REMEDY
Power failure
Check the power supplier if the power supplier is supplied to the
unit. Check the power cord and correct if damaged.
Transformer (Discharge
transformer before testing)
Check resistance between the two input/output lines on
transformer. Replace the transformer if either of the input/output
is open or the transformer is damaged.
No power display
on panel or any one
of the buttons
failure.
Display board or main PCB
failure
Check the voltage on display board. Replace the display board if
it is +5V else replace the main PCB.
Remote control
failure.
Battery failure
Check the voltage of battery. Replace batteries if the voltage is
lower than 2.3V.
Check voltage. Call an electrician if not within limits.
Test capacitor.
Replace if not within +/-10% of manufacture's rating.
Check bearings. Replace the motor if the blower wheel cannot
rotate freely.
Fan motor runs
intermittently
Cycles on overload.
Pay attention to any change from high speed to low speed.
Replace the motor if the speed does not change.
Refrigerant
The amount of the refrigerant is too much, making the
compressor load too big. Recycle and recharge the refrigerant
after checking for the reason.
Compressor stops
instantly after
startup.
Compressor
The compressor is blocked inside. Replace after checking for the
reason.