MCAC-ATSM-201606 Aqua Tempo Super Series air cooled scroll chiller unit (50Hz)
78
Short circuit comes out from motor or connecting
interface.
Confirm resistors at motor are connected
corresponding to terminals.
Compressor stops
because of integrate
temperature sensor or
air discharge
temperature protection.
Over high or over low voltage.
Confirm voltage not higher or lower than the rated
voltage +/-10%.
Over high air discharging pressure or excessive low
air suction pressure.
Adjust refrigerant charge volume.
Clean the heat exchanger.
Check the EXV, capillary, filter.
Check the integrated temperature sensor after
motor is cool down.
Compressor stops
because of low pressure
protection.
Filter of electronic expanding valve is blocked.
Low voltage switch error.
If the switch is defective, please replace a new
one.
Excessive low air suction pressure.
Add the refrigerant.
Clean the heat exchanger.
Check the EXV, capillary, filter.
Abnormal noise gives
out form compressor.
Liquid refrigerant flows into compressor from
evaporator result in liquid slugging.
Adjust refrigerant charge volume.
Replace a new compressor.
Over current relay trip up, fuse burnt out.
Replace damaged assembly.
Control circuit without power though.
Check the wring of control system.
High voltage or low voltage protection.
Reference to mention in above the parts of air
suction and discharge pressure error.
Coils inside contactor are burnt out.
Replace damaged assembly.
Wrong connection of phase sequence.
Re-connect and adjust the any 2 wires among 3
phases.
Water system error and flow volume controller short
connection.
Error signal delivered from wired controller.
Find out the error type and carry out the
corresponding measure to settle.
Air side heat exchanger
excessive frost.
4-way valve or thermal resistor error.
Check the running state. Replace a new one if
necessary.
Settle the short circuit of air discharge.
Fixing screws at panel are loosen.
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