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D-EIMAC00907-16EN - 14/20
Verify operation of all ventilation fans in the electrical panel
X
Verify operation of inverter cooling valve and heater
X
Verify status of capacitors in the inverter (signs of damage, leaks, etc)
X
List of Activities
Weekly
Monthly
(Note 1)
Yearly/Seas
Onal
(Note 2)
Refrigeration circuit:
Check for any refrigerant leakage
X
Verify refrigerant flow using the liquid sight glass
– Sight glass full
X
Verify filter dryer pressure drop
X
Verify oil filter pressure drop (Note 5)
X
Analyse compressor vibrations
X
Analyse compressor oil acidity (7)
X
Condenser section:
Clean water rinse condenser banks (Note 4)
X
Verify that fans are well tightened
X
Verify condenser bank fins
– Comb if necessary
X
Notes
:
1.
Monthly activities include all the weekly ones.
2.
The annual (or early season) activities include all weekly and monthly activities.
3.
Unit operating values should be read on a daily basis thus keeping high observation standards.
4.
In environments with a high concentration of air-borne particles, it might be necessary to clean the condenser bank more often.
5.
Replace the oil filter when the pressure drop across it reaches 2.0 bar.
6.
Check for any dissolved metals.
7.
TAN (Total Acid Number) :
0,10 : No action
Between 0.10 and 0.19 : Replace anti-acid filters and re-check after 1000 running hours. Continue to replace filters until the TAN is lower
than 0.10.
0,19 : Replace oil, oil filter and filter dryer. Verify at regular intervals.
Table 3
–Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment
List of Activities
(Note 8)
Weekly
Monthly
(Note 1)
Yearly/Seas
Onal
(Note 2)
General:
Reading of operating data (Note 3)
X
Visual inspection of unit for any damage and/or loosening
X
Verification of thermal insulation integrity
X
Clean
X
Paint where necessary
X
Clean and paint where necessary
X
Analysis of water (6)
X
Check of flow switch operation
X
Electrical:
Verification of control sequence
X
Verify contactor wear
– Replace if necessary
X
Verify that all electrical terminals are tight
– Tighten if necessary
X
Clean inside the electrical control board
X
Visual inspection of components for any signs of overheating
X
Verify operation of compressor and oil heater
X
Measure compressor motor insulation using the Megger
X
Clean air intake filters of the electrical panel
X
Verify operation of all ventilation fans in the electrical panel
X
Verify operation of inverter cooling valve and heater
X
Verify status of capacitors in the inverter (signs of damage, leaks, etc)
X
Refrigeration circuit:
Check for any refrigerant leakage
X
Verify refrigerant flow using the liquid sight glass
– Sight glass full
X
Verify filter dryer pressure drop
X
Verify oil filter pressure drop (Note 5)
X
Analyse compressor vibrations
X
Analyse compressor oil acidity (7)
X
Condenser section:
Clean water rinse condenser coils (Note 4)
X
Quarterly clean condenser coils (E-coated only)
X
Verify that fans are well tightened
X
Verify condenser coil fins
– Comb if necessary
X
Notes
:
8.
Units placed or stored in a Highly Aggressive Environment for long time without operation are still subject to those routine maintenance steps.
