MovinCool Office Pro 63 Service Manual - Manual (Page 33)

Repair Section
33
7. TROUBLESHOOTING
7.1 Troubleshooting
• Before troubleshooting the system, the following inspection should be performed.
(1) Inspection of power source voltage
• Check the voltage of the power source.
- Three phase 460 V (60 Hz)
• Check the phase sequence of the power source.
< NOTE >
If the phase sequence is reversed, control panel display turns off. In this case, exchange any two
wires out of the three wires to correct the phase sequence.
• Check the operation and condition of the fuse or circuit breaker in the power source.
(2) Inspection of air filters
• Remove the air filters and check the element. If the element is dirty, wash it as described in the
OPERATION MANUAL supplied with the unit.
(3) Inspection of condensate pump
• Remove any dirt or debris which may collect in the bottom of the reservoir tank.
• On a monthly basis, check the condensate drain hose for kinks, blockage or any other damage
that may obstruct condensate pump from draining properly.
• Make sure that motor's cover is closed to keep electrical parts free of dust, dirt and any other
foreign material.
• Condensate pump overflow switch can stop the compressor operation if the pump is
malfunction. To test the condensate pump overflow switch, pinch the drain outlet hose and pour
water into the reservoir inlet drain hole. Continue to fill the reservoir until the rising water lifts the
overflow switch and stops the operation. If the compressor continues to operate when the
reservoir is full, check your installation procedure. After testing is completed, release the drain
outlet hose to enable the condensate pump to empty its reservoir. Make sure the 9 in (230 mm)
section of hose is installed into the inlet drain hole of the pump reservoir.