30(40)
5.
Trouble-shooting
Table 5-1: Single Compressor
Fault
Test Conditions
Troubleshooting
Solution
Compressor
pressure High
Test when the compressor
button has pressed
Stop compressor only
without affect other
equipments to work.
Check if the input is consistent with
the switch setting.
Compressor pressure
Low
If the [LP Check Delay] is 0, test
when the compressor button
has pressed;If the
[LP Check Delay] is not 0, then
compressor runs the test.
Compressor Overload
Compressor runs the test
Water Temp. Low
Test after pump starts
Stop the compressor,
and do not stop the pump.
Check if the water temperature is
lower than the set temperature of
Liquid protection.
Water Temp. High
Stop the compressor,
and do not stop the pump.
Check if the water temperature is
higher than the set temperature of
Liquid protection.
Anti-freeze Err
Power on to test
Stop the compressor,
and do not stop the pump.
Check if the antifreeze input is
consistent with the switch setting.
Water-temp.
Sensor breaks
Check if the temperature probe is
in proper contact.
Water-temp.
Sensor short circuit
Anti-freeze
Sensor breaks
Anti-freeze
Sensor short circuit
Anti-freeze
Temp Low
Check if the antifreeze temperature
is lower than the set temperature of
antifreeze protection.
Blower fault (Only
applicable for
air-cooled series)
Compressor 1 runs the test
Stop the compressor,
and do not stop the pump.
Check if the input is consistent with
the switch setting.
Water Flow Short
Test after the pump
starts for [Pump on Delay] time
Stop the unit
Check if the water flow input is
consistent with the switch setting.
Pump Overload
Test after pump starts
Stop the unit
Check if the pump overload input is
consistent with the switch setting.
Phase Err
Power on to test
Stop the unit
Check if there is default phase or
anti-phase in the three-phase
power input and if the switch is
correct.
Water Level Low
Power on to test
Stop the unit
Check if the water level input is
consistent with the switch setting.
Need Maintenance
Test after pump starts
The unit cannot start once
stops (the accumulative
operation time of
compressor exceeds the
set value).
Need Maintenance
