Midea MPM1-10CEN1-BB6 Technical & Service Manual page 30

Loose screws
Worn bearings
Voltage
Wiring
Main PCB failure
Compressor will
not run while fan
Capacitor (Discharge
motor runs. capacitor before testing)
Room temp sensor
Compressor
Excessive noise. Copper tubing
Water tank full
Water depth sensor if
failure
Water pump failure
Water full alarm
Water depth is over load
in chassis
Water depth sensing
structure
Air filter
Air discharge pipe
Unit undersized
Condenser and
Evaporator
Cooling or
heating feels not
Water shower failure
good
Fan motor
Air flow
Less refrigerant
28
Tighten them.
Replace the motor if knocking sounds continue when
running or loose, or the motor hums or noise appears to be
internal while running.
Check voltage. Call Supply Authority if not within limits.
Check the wire connections, if loose, repair or replace the
terminal. If wires are off, refer to wiring diagram for
identification, and replace. Check wire locations. If not per
wiring diagram, correct.
Check voltage of main PCB. Replace the main PCB if open.
Check the capacitor.
Replace if not within +/-10% of manufacturers rating.
Replace if shorted, open, or damaged.
Check the temperature setting if not at the coolest (in
cooling mode) or the warmest (in heating mode). Set it if
not.
Check the compressor for open circuit or ground. If open or
grounded, replace the compressor.
Remove the cabinet and carefully rearrange tubing not to
contact cabinet, compressor, shroud and barrier.
Check and pour if the water tank is full.
Check and replace if failure.
Check and replace if the pump if failure.
Check and drainage the water in the chassis by open the
drainage hose on the chassis.
Check and replace or realign if the structure is failure.
Clean or replace if restricted.
Realign and assemble if the installation of the air
discharging pipe failure. Replace if damaged.
Determine if the unit is properly sized for the area to be
cooled or heated.
Clean or replace if restricted.
Check the structure of water showering system and clean if
blocked.
Check the fan capacitor and replace if not within +/-10% of
manufactures rating.
Clean or remove if any barrier is found to block the
inlet/outlet wind flow of the unit.
Check the tubes for reasons of leakage. Recycle the
refrigerant, correct the leakage points and recharge.
Trouble shooting