Midea MGBT-F25W/DN1

MCAC-ATSM-2014-09 R410a tropical air-cooled scroll chiller unit 60Hz
Troubleshooting 115
2) Low pressure protection
Low pressure protection.
No
Discharge temp. protection
Discharge temp. switch is
broken or joint is loose.
Yes
Yes
Replace discharge temp.
switch, fixed joint.
Yes
Yes
Yes
Yes
No
No
No
No
Detect leakage for all
system, append
refrigerant.
Refrigerant is few.
Replace the EXV or coil.
Cause of dirty and
blocked, replace the
EXV, capillary and filter.
Vacuuming and append
refrigerant if ice blocked.
Check if happened
frequently, if yes, please
replace PCB.
EXV cannot be opened.
The EXV, capillary and filter
are dirty, blocked and ice
blocked.
PCB mistakes to alarm.
Inform the customer
service center.
Refrigerant is few.
Inspect leakage in system,
append refrigerant.
Replace the EXV and coil.
Cause of dirty and blocked,
replace the EXV, capillary and
filter. Vacuuming and append
refrigerant if ice blocked.
Inspect if the water flow is
normal, refer to the water flow
malfunction to analysis.
EXV cannot be opened.
The EXV, capillary and filter are
dirty, blocked and ice blocked.
The pressure controller is
broken or joint is loose.
Anti-freezing lower pressure
protection.
Inform the customer service
center.
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Replace the pressure controller,
fixed joint.