MCAC-ATSM-2011-12 Air-cooled modular chiller unit 50Hz
107
Troubles Possible reasons Solutions
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 20V
Over high air expelling pressure or
excessive low air suction pressure
See “Over high air expelling pressure” and “excessive
low air suction pressure ”
Component error
Check the integrated temperature sensor after motor is
cool down
Compressor stops
because of
Lo.-pressure
protection
Filter in front (or rear) of expanding valve is
blocked
Replace a new filter
Lo-voltage switch error If the switch is defective, please replace a new one
Excessive low air suction pressure See “Excessive low air suction pressure”
Abnormal noise gives
out form compressor
Liquid refrigerant flows into compressor
from evaporator result in liquid slugging.
Adjust refrigerant charge volume
Aging of compressor Replace a new compressor
Compressor can’t start
Over current relay trip up, fuse burnt out Replace damaged assembly
Control circuit without power though Check the wring of control system
Hi-voltage or lo-voltage protection
Reference to mention in above the parts of air suction
and discharge pressure error
Coils in 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 type volume
controller short connection
Check water system
Error signal delivered from wire 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
Air loop short-circuit Settle the short-circuit of air discharge
With noise Fixing screws at panel are loosen Fix up all assemblies
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