Service And Maintenance; Troubleshooting; Phase Protector (Optional) - McQuay D series Installationsanleitung

Service Parts
1. Remove any dust adhering to the filter by using a vacuum cleaner or wash in
Indoor air filter
2. Rinse the filter well and dry before placing it back onto the unit.
3. Do not use gasoline, volatile substances or chemicals to clean the filter.
1. Clean any dirt or dust on the grille or panel by wiping it with a soft cloth
Indoor unit
2. Do not use gasoline, volatile substances or chemicals to clean the
Do not operate any heating apparatus too close to the air conditioner unit. This may cause the plastic panel to melt or deform as a result
If any malfunction of the air conditioner unit is noted, immediately switch off the power supply to the unit. Check the following fault
conditions and causes for some simple troubleshooting tips.
1. The compressor does not operate 3 minutes after the air
conditioner unit is started.
2. The air conditioner unit does not operate.
3. The airflow is too low.
4. Discharge airflow has bad odor.
5. Condensation on the front air grille of the indoor unit.
6. Water flowing out from the air conditioner unit.
7. Hissing airflow sound from the air conditioner unit during
operation.
If the fault persists, please call your local dealer / serviceman.
The unit with Scroll Compressor can only rotate in one direction. For this reason, a protective device (phase protector) is
fitted to prevent incorrect wiring of the electrical phases. When the three phases are not connected correctly, the phase
protector operates, and the unit will not start. This devise is located in the control box of the outdoor unit.
The following table shows the LED indicator light for phase protector under normal operation and fault conditions.
LED
Description
Normal operation
Reverse phase
T phase missing
S phase missing
R phase missing
+
S & T phase missing
+
Overload
+
Sensor missing
ON
Notes : 1. "+" indicates additional functions for PP01 phase protector.
2. When R phase missing, no LED or buzzer will indicate the error, but relay 71 and relay 81 will cut off.

SERVICE AND MAINTENANCE

Maintenance Procedures
lukewarm water (below 40°C) with a neutral cleaning detergent.
soaked in lukewarm water (below 40°C) and a neutral detergent solution.
indoor unit.
!
of the excessive heat.

TROUBLESHOOTING

Fault

PHASE PROTECTOR (OPTIONAL)

PW P_R P_S
(Red) (Yellow) (Yellow)
OFF
!
• Troubleshooting must be performed by qualified personnel.
Caution
- Protection against frequent starting. Wait for 3 to 4 minutes for
the compressor to start operating.
- Power failure, or the fuse needs to be replaced.
- The power plug is disconnected.
- It is possible that your delay timer has been set incorrectly.
- If the fault persist after all these verifications, please contact the
air conditioner unit installer.
- The air filter is dirty.
- The doors or windows are open.
- The air suction and discharge are clogged.
- The regulated temperature is not high enough.
- Odors may be caused by cigarettes, smoke particles, perfume
etc. Which might have adhered onto the coil.
- This is caused by air humidity after an extended long period of
operation.
- The set temperature is too low, increase the temperature setting
and operate the unit at high fan speed.
- Switch off unit and call dealer.
- Refrigerant fluid flowing into the evaporator coil.
P_T
(Yellow)
Switch off the unit. Check the 3 phase wiring.
Switch off the unit. Check the 3 phase wiring.
Switch off the unit. Check the 3 phase wiring.
Switch off the unit. Check the 3 phase wiring.
Switch off the unit. Check the 3 phase wiring.
High discharge temperature. Check the refrigerant system.
Switch off the unit. Plug in sensor.
Fast Blink
Warning
1-10
Period
At least once every 2
weeks.
More frequently if
necessary.
At least once every 2
weeks.
More frequently if
necessary.
Causes / Action
Actions
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