Maintenance - Haier CA0035EAND Installation And Operation Manua

Maintenance

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Maintenance
Before delivery, the units have been strictly tested and inspected to ensure good working performance
after delivery. To ensure long-term good operation of the units, users shall provide regular maintenance.
1. Inspection and cleaning of condenser
To ensure effective operation of the condenser and maximize heat exchange, the appearance must be
clean, and free from fallen leaves, cotton velvet, insects and other foreign matters which may result in
clogged fin of the condenser.
2. Inspection and cleaning of heat exchanger
To determine if the water-side heat exchanger is cleaned, please check the water inlet and outlet
temperatures of the heat exchanger, and compare them with the evaporating temperature.
For example, if the difference between the water outlet temperature and the evaporating temperature
exceeds 5–7℃ at the rated flow, the working efficiency of the heat exchanger has been lowered, and
cleaning is required.
Some chemical treatments are required during cleaning, thus such cleaning must be completed by
professionals.
3. Make-up of refrigerant and lube oil
Each unit in delivery has been provided with sufficient refrigerant R410A and lube oil.
The normally running system requires no make-up of refrigerant or lube oil. Charging or replacement of
refrigerant or lube oil at will is also not allowed. If make-up is required due to leakage, please refer to the
charge stated on the unit nameplate.
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