Troubleshooting

The unit generates abnormal voice.

The compressor, fan, or pipes are loose.

Check the fixing structure and ensure that all components are securely installed.

The compressor does not work.

The high-pressure switch reacts.

Check the high-pressure switch status.

Circuit breakers, fuses, or cables are disconnected.

Check the main circuit breaker, compressor circuit breakers, fuses, and cables.

A compressor motor is damaged.

Replace the motor.

A compressor does not need to start.

Check the requirement status on the display module.

The compressor does not work.

Check whether the drive is faulty. Replace it if it is faulty.

The compressor discharge temperature is too high.

The refrigerant loop or a component is blocked.

Clean the blockage in the refrigerant loop.

The outdoor unit is installed in an inappropriate position. (The outdoor unit should not be exposed to direct sunlight and must be installed at a specified spacing according to the installation guide.)

Install the outdoor unit in a correct position, without exposure to direct sunlight and with an appropriate spacing.

Air exists in the cooling system.

Exhaust air, and examine and repair the pipeline.

Heat dissipation is poor because of blockages in the condenser.

Clean the condenser fins.

An outdoor fan fails.

Check whether the outdoor fan works.

Refrigerant is insufficient.

Increase the amount of refrigerant filled.

The compressor exhaust pressure is too low.

The outdoor fan speed controller fails.

Replace the speed controller.

Refrigerant is insufficient.

Increase the amount of refrigerant filled.

Refrigerant is leaking.

Check the pipeline for any leakage.

The exhaust pressure of the compressor is too high.

The refrigerant is overfilled.

Fill refrigerant according to the refrigerant filling requirements.

The outdoor fan is faulty.

Check that the outdoor fan is running properly.

The compressor suction pressure is too low or liquid returns.

The refrigerant filled is insufficient.

Add the refrigerant.

The indoor temperature is too low.

Change the temperature setting.

Filters are clogged with dirt.

Replace the filters.

The external excess pressure is too high, and air decreases.

Check whether the air duct is blocked.

The condensing pressure is too low.

Check the condenser.

The compressor generates excessive noises.

Liquid returns in a compressor.

Check whether the oil temperature and discharge temperature are within the normal range.

Refrigerant oil is insufficient.

Add refrigerant oil.

The transport sheet metal is not removed from a compressor.

Remove the sheet metal.

An indoor fan fails to start.

The switch of the indoor fan is not turned on.

Check the switch of the indoor fan.

An indoor fan is damaged.

Replace the indoor fan.

The interconnection terminals for the indoor fan are not securely connected.

Secure the interconnection terminals again.

The heating function is unavailable.

The electric heater temperature switch is being protected.

Check the temperature switch and replace it if it is faulty.

The electric heater is not switched on.

Check the electric heater switch.

An electric heater is burnt out.

Disconnect the power supply and check whether the electric heater is damaged by checking the electric heater resistance properties with an ohmmeter.

No water is supplied to the water inlet solenoid valve of the humidifier.

The upstream water supply is faulty or the water pressure is below the lower threshold.

Restore the water supply.

The water inlet solenoid valve is blocked or faulty.

Replace the water inlet solenoid valve.

The cable to the water inlet solenoid valve is incorrectly connected.

Reconnect the cable.

Water in the smart cooling product overflows.

The drainpipe does not connect to the pump, or the lift between the drainpipe and the water chiller is set to an appropriate value.

Ensure that the drainpipe is properly connected to the pump and that the lift of the drainpipe is lower than 4 meters.

The condensate pump is faulty.

Replace the condensate pump.

The liquid level detector is faulty.

Check the alarm. Check cable connections for high and low liquid level detectors. Check whether the liquid level detectors are damaged. If necessary, replace the liquid level detectors.

The inlet pipe and drainpipe leak.

Check the inlet pipe and drainpipe and the connectors. Rectify any leakage and fasten the connectors.

The automatic drainage pipe is blocked.

Check whether the automatic drainage port is blocked and whether the automatic drainage pipe contains foreign matter or is frozen.

The humidity of the computer room is high, or condensate water is generated.

The server heat load for each smart cooling product is lower than 5 kW.

• Verify that the doors, windows, floors, and ceilings of the computer room are properly sealed.
• If the outdoor humidity is too high, shut down the fresh air system.
• Open the aisle doors or control skylights of the smart module, or open the filler panels of some server cabinets.

Power failures occur on the active and standby routes.

1. The input power has an open phase.
2. The contactor fuse in the active route is damaged.
3. The interlock contactor and middle contactor are damaged.

1. Rectify the power supply fault.
2. Replace the fuse.
3. Replace the interlock contactor and middle contactor.

The electric heater switch trips abnormally.

The switch is faulty.

Replace the electric heater switch.

The electric heater fails.

The electric heater contactor is not closed.

Replace the electric heater contactor.

The compressor switch trips abnormally.

The switch is faulty.

Replace the compressor switch.

The electric heating belt of the crankcase does not heat.

1. The electric heating belt of the crankcase is disconnected abnormally.
2. The fuse has blown.
3. The electric heating belt of the crankcase is short-circuited abnormally, and the fuse has blown.

1. Replace the electric heating belt of the crankcase.
2. Replace the fuse.
3. Replace the electric heating belt of the crankcase and the fuse.

The electric heating belt of the crankcase does not stop heating.

The relay contacts of the electric heating belt of the crankcase are short-circuited.

Replace the electric heating belt of the crankcase relay.