Cleaning and Maintaining
20
English
Cleaning and Maintenance
The air conditioner control system has internal protection for user comfort and system faults.
Type Description
Cold air prevention
While in heat mode, the internal fan will not operate while the indoor
unit coil is warming up to prevent the circulation of cold air.
Defrost cycle
While the heat pump defrosts, the internal fan will not operate to
prevent circulation of cold air.
Anti-Freezing of Indoor Heat
Exchanger
The compressor will be off if the heat exchanger temp of the indoor
unit decreases to 32 °F (0 °C) or more to prevent the ice on the heat
exchanger.
Protect compressor
The air conditioner does not start operating immediately to protect the
compressor of the outdoor unit after it has been started.
NOTE
• If the heat pump is operating in Heat mode, the defrost cycle is actuated to remove frost from an
outdoor unit that may have deposited at low temperatures.
• The internal fan is switched off automatically and restarted only after the defrost cycle is completed.
• When the defrost cycle is operating, it may generate strange sounds. It is normal operation for product
safety.
Internal protections via the unit control system
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