Maintenance Instructions - MAXA HCA22 Manual De Usuario

5. The exchangers are clean;
6. The electrical connections are correct;
7. The screws holding the conductors are tightly fastened;
8. The power supply voltage is correct;
9. The motor-driven fan or electric heater absorption is correct and does not exceed the maximum permitted level; 10.
The suction grille is not blocked by residual installation material and the filter is clean and correctly positioned. We
recommend running the unit at maximum speed for several hours.
II. 4 MAINTENANCE INSTRUCTIONS
DANGER!
Skilled technicians, qualified to work on conditioning and cooling products, must carry out scheduled maintenance.
Use suitable gloves.
DANGER!
Do not introduce pointed objects through the air inlet or outlet grilles.
DANGER!
Always use the mains switch to isolate the unit from the mains before carrying out any maintenance work on the unit,
even if it is for inspection purposes only. Make sure that no one accidentally supplies power to the machine; lock the
mains switch in the OFF position.
II. 4.1 ORDINARY MAINTENANCE
II. 4.1.1 Monthly
○ Check the cleanliness of the air filters.
The air filters are made from fibre that can be washed with water. The cleanliness of the filters must be checked at the
start of the operating season and on a monthly basis as standard.
II.4.1.2 Every six months
○ Check the cleanliness of the exchanger and the condensation drain. With the unit switched off, check the condition
of the exchanger and the condensation drain. If necessary:
• Remove any foreign bodies from the finned surface which may obstruct the air flow;
• Clean off the dust with a jet of compressed air;
• Wash with water and brush gently;
• Dry with a jet of compressed air.
• Make sure that the condensation drain does not contain any blockages that could hinder the normal water flow. ○
Make sure that there is no air in the water system.
1. Start up the system for a few minutes;
2. Stop the system;
3. Loosen the bleed screws on the inlet line and bleed; repeat the operation several times until no more air comes out
of the system
II. 4.1.3 End of season
○ Empty the water system (for all the coils). In order to prevent damage caused by frost, we recommend draining all
the water from the system at the end of each season.
II. 4.1.4 Electrical circuit
We recommend carrying out the following electrical circuit maintenance operations:
• Check the electrical absorption of the unit using an ammeter and compare the value with that indicated in the
documentation.
• Inspect and check the tightness of the electrical contacts and terminals.
II. 4.2 SPECIAL MAINTENANCE
II. 4.2.1 Replacing the fan
If the fan electric motor breaks, it will need to be replaced.
○ To remove the fan, proceed as follows:
• Remove the frame assembly by unscrewing the screws;
• Disconnect the electrical connection wires;
• Remove the condensation drain tray (see below);
• Remove the fan;
• Remove the fan motor;
• To replace the fan, proceed in reverse order.
II. 4.2.2 Replacing the exchanger
○ To remove the exchanger, proceed as follows:
○ Remove the frame assembly by unscrewing the screws;
○ Disconnect the electrical connection wires;
○ Remove the condensation drain tray (see below);
○ Intercept the water outlet and inlet;
○ Disconnect the coil from the system;
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