D-EIMWC01008-16_03EN - 32/35
Standard Routine Maintenance Plan
Routine maintenance programme
(Note 2)
Weekly
Monthly
(Note 1)
Yearly
(Note 2)
General
Reading of operating data (Note 3)
X
Visual inspection of machine for any damage and/or loosening
X
Verification of thermal insulation integrity
X
Clean and paint where necessary
X
Analysis of water (Note 5)
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 electrical resistance
X
Measure compressor motor insulation using the Megger
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 4)
X
Analyse compressor vibrations
X
Analyse compressor oil acidity (Note 6)
X
Check safety valves (Note 7)
X
Condenser section:
Clean the exchangers (Note 8)
X
Notes:
1. Monthly activities include all the weekly ones
2. The annual (or early season) activities include all weekly and monthly activities
3. Machine operating values should be read on a daily basis thus keeping high observation standards
4. Replace the oil filter when the pressure drop across it reaches 2.0 bar
5. Check for any dissolved metals
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 : Change oil, replace oil filter and filter dryer. Verify at regular intervals.
6. Safety valves
Check that the lid and seal have not been tampered with.
Check that the discharge socket of the safety valves is not obstructed by any objects, rust or ice.
Check the manufacturing date shown on the safety valve.
7. Clean the pipes of the exchanger mechanically and chemically if the following occur: drop in the condenser
water capacity, drop in the differential temperature between inlet and outlet water, high temperature
condensation
.
This unit, whether with R134a, R513A or R1234ze, must be maintained by qualified technicians. Before
beginning any work on the system, personnel shall assure that all security precautions have been
taken.
Always protect the operating personnel with personal protective equipment appropriate for the tasks
to be performed. Common individual devices are: Helmet, goggles, gloves, caps, safety shoes.
Additional individual and group protective equipment should be adopted after an adequate analysis
of the specific risks in the area of relevance, according to the activities to be performed.