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4.- MAINTENANCE
4.2.- MAINTENANCE PLAN
MAINTENANCE PLAN
N°
Task
Inspection of the microchannel
1
coils aluminum-copper connexions
for corrosion.
Cleanning the coils (In accordance
2
with local regulations).
Inspection of compressor's elec-
3
trical current.
Electrical cabinets air-filters
4
cleanning.
5
Inspection of the condensors fans.
Visual inspection of the oil level
6
and check the oil for traces of
acidity in the refrigerant circuits.
7
Check the 4-way valve.
Check the position of the crank-
case heaters ( around the
8
compressor) and it's proper
functioning.
Verification of the defrost cycle
9
with 4-way valve inversion.
If possible, check for water pres-
10
sure in the circuit.
Check overall working of the flow
11
controller.
12
Check the circulation pumps.
Installation manual / eCOMFORT R32-MIL166E-0222 - 09/2022
Operating mode
Proper care to be given when cleaning the coils. If corrosion is detected,
a preventive treatment needs to be done following our recommendations.
It's mandatory to clean the external coils, according to the environment
where the unit is located, the frequency of the cleaning varies from once
in a month to minimum twice in a year.
The performance and the sustainability of the machine is based on the
perfect heat exchange.The use of a neutral pH cleaning product is
mandatory.
(WARNING: Fins and copper tubes are very fragile! Any damage WILL
reduce the performances of the unit).
Check the electrical current of each compressor on the 3 phases of par-
tial load and at 100% - with a certain frequency, according to the utiliza-
tion of the machine. Example:
Monthly: If the unit is used all over the year.
Half Year: If seasonal use.
It's mandatory to clean the filters at least once a month according to
environment where the unit is located to avoid overheating the electrical
components.
Check the filter fouling rate, clean or replace it when needed by an ori-
ginal filter.
Check the rotation of the fan ( free rotation, detection of vibrations or
bearing noises).
Check for the Amps consumed on all three phases; compare it with the
nominal value given in the electrical wiring diagram.
Check the status of the fan blades and its protections.
Visually check the oil level through the sight glass on the side of the com-
pressor casing. Test the oil every 3 years and/or after each intervention
on the refrigerant circuit.
During cooling mode, reverse to Heat Pump mode.
Reset the control.
Ensure crankcase heaters is well fitted and secured.Verify the operation
of the crankcase heaters.
Switch the unit to heat pump mode. Change the set point to obtain the
standard defrost mode and reduce the cycle time to the min value. Check
the operation of the defrost cycle.
Check the water pressure in the circuit and the efficiency of the expan-
sion vessels.
Cut-off the compressors, stop the water circulation. Then start the unit
and wait for the water flow fault signal in the controller.
Check the absorbed electrical power and the correct rotation of the
pumps.
Check if there is no leakage of water at pump seal and if needed follow
the manufacturer maintenance plan.
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