Troubleshooting General Errors - LG ACAH020HETB Installation And Owner's Manual

TROUBLESHOOTING GENERAL ERRORS

WARNING
troubleshooting of the Chiller product.
Troubleshooting General Errors
If the safety devices stopped chiller operation, identify and resolve the problem(s) before restart.
• If the chiller is not operating, check the power, refrigerant, configuration, and error settings.
• To troubleshoot the power supply / wiring, check the voltage connected to the chiller terminal block in the control panel. If there is no power,
check if the circuit breaker has tripped.
• If the power is properly connected, check the chiller refrigerant cycle pressure to verify if it is within the normal range.
• If the chiller refrigerant cycle pressure exceeds the normal range, check for leaks within the piping system.
• Before restarting the chiller, return it the default setting.
• Check the error codes; error codes can be view using the HMI device.
• If there is /are (an) error code(s) the alarm is turned on, see the Error Code tables to troubleshoot specific errors.
Table 41: Troubleshooting General Errors.
Symptom
Chiller does not start.
Evaporation pressure is
low and the chiller is
constantly stopping.
Condensation pressure
is high and the chiller is
Foreign particles accumulated on the condenser.
constantly stopping.
Chiller is vibrating.
76
Cause
Check the power.
Incorrect or inaccurate chiller configuration.
Error appears.
Entering delay time.
Insufficient refrigerant.
Insufficient water.
Outside temperature is high.
Fan is defective.
Bolt connecting the fan motor is loose.
Motor mount is loose.
Fan is not balanced.
Compressor assembly bolt is loose.
Frame assembly bolt is loose.
Motor bearing is burned.
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Solution
Check over-current protection device.
Check if fuse is disconnected or shorted out.
Turn power on.
Check configuration.
Check if wiring is incorrect.
Check the error condition.
Check for the error code tables to review solutions and resolve
the issue.
Follow direction.
Check the HMI input channel to review the error input.
Verify if the compressor is in start delay time.
Check for leaks and recharge refrigerant.
Check water system (ensure rated flow.).
- Is the water system valve closed?
- Is the pressure difference between inlet and outlet of the
water system appropriate?
- Is the air from water system cold?
Check if the outside temperature is within the operation
condition range.
Clean condenser.
Replace fan.
Check assembly and tighten bolt.
Check assembly and tighten bolt.
Check fan rotation range; replace fan.
Tighten assembly bolt / nut.
Check assembly and tighten bolt
Check for abnormal noise in motor (noise in multiple RPM)
and replace motor.