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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
Performance evaluation, with
or without abnormal sound
Is the wiring secure
Whether
the
current
abnormal (within 10%)
Compressor
exhaust
temperature
Detecting oil level
Check
the color
of
lubricant
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
Check water quality
Cleaning shell-and-tube heat
exchanger
Seasonal
protection
measures (winter antifreeze)
Cleaning fins
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
per month
Each quarter
●
●
is
the
3. Shell and tube heat exchanger
●
4. Finned heat exchanger
●
Half a year
1.Compressor
★
★
2. Controller
★
★
★
★
★
★
★
5.other
●
25
One year
base on needs
★
★
★
★
★
★
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