Haier CA0065EANR, Installation And Operation Manual

Page: 28 / 40

25
Repair and maintenance
6.1 Regular inspection of the project
Before delivery, the unit has been rigorously tested and inspected to ensure that the product has good
performance after leaving the factory. In order to ensure long-term good operation of the unit, the user
should carry out regular maintenance and maintenance.
1. Condenser inspection and cleaning
In order to ensure the effective work of the condenser and the maximum heat exchange, the outside
must be cleaned without any contaminants such as fallen leaves, lint, insects and the like that easily
block the condenser fins.
2. Inspection and cleaning of heat exchangers
To determine if the water side heat exchanger is clean, check the heat and water temperature of the
heat exchanger and compare it to the evaporation temperature. For example, if the outlet temperature
and the evaporation temperature differ by more than 5~7 °C at the rated water flow rate, the operating
efficiency of the heat exchanger has been reduced and cleaning is required.
Since some chemical treatment is required during the cleaning process, cleaning must be done by a
professional.
3. Replenishment of refrigerants and lubricants
Each unit is shipped with sufficient refrigerant R410A and lubricant. When the system is working properly,
there is no need to replenish refrigerant or lubricating oil, and it is not allowed to charge or replace
refrigerant and lubricant. If it is necessary to replenish due to leakage, please refer to the charging
amount specified on the nameplate on the unit.
6.2 Maintenance
During the use of the unit, certain routine inspections must be carried out to ensure the performance of
the unit. This is also to avoid unnecessary downtime routine inspections including the following items:
Item details per month Each quarter Half a year One year base on needs
1.Compressor
Performance evaluation, with
or without abnormal sound
●
Is the wiring secure ●
Whether the current is
abnormal (within 10%)
★
Compressor exhaust
temperature
★
Detecting oil level ★
Check the color of the
lubricant
★
2. Controller
Check parameter settings ★
Inspection protection
★
Delay protector
★
Phase sequence protector ★
High and low voltage switch ★
Water pressure difference
switch, water flow switch
★
Overload protector ★
Exhaust gas temperature
protector
★
3. Shell and tube heat exchanger
Check water quality ●
Cleaning shell-and-tube heat
exchanger
★
Seasonal protection
measures (winter antifreeze)
★
4. Finned heat exchanger
Cleaning fins
★
5.other
Does the Y filter need to be
replaced and cleaned?
●
Is the unit screw loose?
●
Remarks: The above maintenance plan is only for guidance (for reference), and the specific