R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01
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17. Troubleshooting
17.1 Troubles cause and solution
1. Voltage is out of operation range.
2. Water flow in the water pump box is
abnormal
Check whether the water system is blocked with
sundries. Clean the filter and refill water.
Water pump works while
compressor does not work.
1. Open-circuit of compressor
connector
Check the cable connection.
2. Open-circuit of compressor wiring
Check the cable connection.
Temperature of chilled or hot
water abnormal.
1. Improper adjustment to water valve
Change to a bigger capacity chiller.
Compressor can’t run
automatically after stop.
Change the mode into cooling mode.
Change the mode into heating mode.
17.2 Malfunction code
Water flow test malfunction.
Power phase sequence malfunction.
High pressure protection.
Indoor & outdoor unit communication
checking channel is abnormal.
Inlet temperature sensor checking
channel is abnormal.
Discharge temperature protection.
Outdoor ambient temperature sensor
checking channel is abnormal.
Inlet–outlet water temperature difference protection.
Outlet water temperature sensor checking
channel is abnormal.
Condenser high temperature protection.
Condenser temperature sensor checking
channel is abnormal.
Plate heat exchanger low temperature protection.
Plate heat exchanger temperature sensor
1 checking channel is abnormal.
System anti-freezing protection.
Plate heat exchanger temperature sensor
2 checking channel is abnormal.
Inlet temperature protection (three times in one hour and
system should be powered on again).The wired controller
displays P4 when spot check.
Digital scroll compressor discharge
temperature sensor is abnormal
(thermostat display E4).
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