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The system maintenance must be carried out by a qualified maintenance personnel:
Table 7.1
Symptom
If a safety device, such as a fuse, circuit breaker or a leakage
circuit breaker is triggered frequently or the ON/OFF switch is
not working properly.
The operating switch is not functioning normally.
The operating indicator is flickering, and an error code is
shown on the screen as well.
Other than the above-mentioned situations, and where the fault is not obvious, if the system continues to malfunction, carry out
the following steps to investigate.
Table 7.2
The system does not run at all.
The system works fine in the fan-only operating mode but
stop running once it enters the heating or cooling operation
modes.
The system is running but there is insufficient cooling or
heating.
Symptom
Measures
Turn off the main power switch.
Turn off the power supply.
Notify the installation personnel and report the error code.
Measures
Check if there is a power failure. Wait for the power supply to
be restored. If a power failure occurs when the unit is still
running, the system will restart automatically once the power
is restored.
Check if the fuse is broken or if the circuit breaker is working.
If necessary, replace the fuse or reset the circuit breaker.
Check if the air inlets or outlets of the outdoor or indoor units
are blocked by any obstacles. Remove the obstacles, and
maintain good ventilation in the room.
Check if the air inlets or outlets of the outdoor or indoor units
are blocked by any obstacles.
Remove the obstacles, and maintain good ventilation in the
room.
Check if the filter is blocked (please refer to the
"Maintenance" section in the manual of the indoor unit).
Check the temperature settings.
Check the fan speed settings on the user interface.
Check if the doors and windows are open. Close the doors
and windows to shut out wind from the external environment.
Check if there are too many people in the room when the
cooling mode is in operation. Check if the heat source of the
room is too high.
Check if there is direct sunlight into the room. Use curtains or
blinds.
Check if the air flow angle is proper.
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