Typical Malfunction Solutions; High Pressure And Discharged Temperature Protection - Midea Aqua Tempo Super Series Technical & Service Manual

Aqua Tempo Super Series air cooled scroll chiller unit (50Hz)

12.3 Typical malfunction solutions

1) High pressure and discharged temperature protection

High pressure
discharged protection.
High pressure protection.
Blower stops rotating or rotates in
reversed direction in cooling mode,
water pump is not open or the flow.
Couldn't start the EXV.
Pressure controller is broken
or the joint is loose.
Fin heat exchanger in cooling mode is too
dirty or aged, or too heavy encrustation in
shell-tube for heating.
EXV, capillary and filter are
dirty, blocking.
There is air and filled refrigerant
too much in system.(Generally
occur after maintenance.)
PCB mistakes to alarm.
Inform
service center.
and
Yes
Yes
No
Yes
No
No
No
No
No
Yes
No
the customer
No
Discharge temperature
protection.
Inspect fan motor and
Yes
capacitor (1phase)
start up the water pump.
Replace EXV or coil.
Yes
Replace press controller,
fixed joint.
Yes
Clean heat exchanger.
Yes
Replace EXV, capillary
and filter.
Empty, vacuuming and
Yes
append refrigerant if
necessary.
Check if it happened
frequently, if yes, please
replace PCB.
79
MCAC-ATSM-201606
See the
Yes
discharge temp. protection
malfunction.
or
analysis of