Midea MGBT-F180W/DN1

R410a tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09
116 Troubleshooting
2) Current protection
3) High temperature protection of condenser
High temp. protection of
condenser.
Yes
Clean heat exchanger.
Check the fan motor,
capacitor (1 phase) or
start up water pump.
Empty, vacuuming and
append refrigerant if
necessary.
Check power supply,
start up the unit after
normal power supply.
Replace PCB.
Inform the customer service
center.
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Abnormal power supply.
Air is in system, filled in too
much refrigerant(Generally
happened after maintenance.)
PCB mistakes to alarm.
Yes
Yes
The fin of heat exchanger is
dirty or aged in cooling mode.
Clean heat exchanger.
Replace PCB.
Replace temp. sensor.
Check the fan motor,
capacitor (1 phase).
Replace installation
position of unit.
PCB mistakes to alarm.
No
The installation position of unit
results in bad heat transfer of
condenser.
Yes
Yes
Yes
Yes
No
In cooling mode, the fan motor
stop running, reversal and run
slowly.
The temp. sensor of condenser
bring drifting when collect
temp.
No
No
No
Inform the customer service
center.
Current protection
The fin of heat exchanger is
dirty or aged in cooling mode,
or the shell-tube scaled
strong.
The fan motor stopped running
in cooling mode, reversal and
run slowly. The water pump
didn’t start up or less water
flow in heating.