System Operation and Maintenance
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6.7. Maintenance of Cooling System
The components of the cooling system must be inspected monthly to check if the system is functioning properly and for the
sign of wearing. Since the unit failure or damage is often accompanied by corresponding failures, regular inspections are the
main means to prevent most system failures.
1. The surface of the evaporator should be kept clean and there should be no reversal films.
2. The EEV is mainly subjected to electrical and mechanical faults.
• The electrical faults include electronic expansion valve control board power supply, coil faults, control board cabling
loosening, and pressure & temperature sensor faults.
• The mechanical faults include electronic expansion valve body blockage and clogging, so if the EEV fails, check whether
the control panel power supply, control panel wiring, pressure and temperature sensor wiring is loose or not, and whether
the valve body itself is malfunctioning.
3. Check whether the refrigerant piping have the proper support, or it is leaned against the wall, floor or its frame is
vibrating. If identified in such a condition fixed it immediately.
4. Check the refrigerant piping and fix the brackets in every six months.
Note: It is not recommended that customers adjust the EEV by themselves. If user need some adjustment, contact Vertiv
local representative or technical support engineer
.
6.8. Maintenance of Drainage System
In order to ensure the normal drainage, it is necessary to check the drainage pan regularly.
• To ensure that there are no large scaling, debris, or leakages in the drain pan. Regularly check and cleaning of the drain
pan filter is imperative.
• To prevent poor drainage caused by blockage, as shown in
. Regularly check whether the drain pump power
supply is normal and whether the cabling is firmly connected.
The procedures for replacing condensate pump:
1. Cut off the power supply of the unit.
2. Open the rear door, unscrew the hose clamp and pull out the drain pipe of the water pan.
3. Unscrew the hose clamp fixing the water pump.
4. For reinstall the water pump, reverse the above steps.
