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15
OPERATING RANGE
PHASE PROTECTOR
English
Ensure the operating temperature is within the allowable range, as stated in diagram below:
Indoor WB temperature (°C)
Outdoor DB temperature (°C)
52
50
19
14
19
23
!
CAUTION
The use of the air conditioner outside the
range of working temperature and humidity
can result in serious failure.
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 device 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.
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.
LED
Description
PW
(Red)
P_R
(Yellow)
P_S
(Yellow)
P_T
(Yellow)
Actions
Normal operation
-
Reverse phase
Switch off the unit. Check the 3 phase wiring.
T phase missing
Switch off the unit. Check the 3 phase wiring.
S phase missing
Switch off the unit. Check the 3 phase wiring.
R phase missing
Switch off the unit. Check the 3 phase wiring.
S &T phase missing
+
Switch off the unit. Check the 3 phase wiring.
Overload
+
High discharge temperature. Check the refrigerant system.
Sensor missing
+
Switch off the unit. Plug in sensor.
ON
OFF
Fast Blink
!
WARNING
Troubleshooting must be performed by qualified personnel.
•
Model: UATQ60/90C
Model: UATQ120/150/180/210/240/300C
LED
Description
PW
(Red)
P_S
(Yellow)
P_T
(Yellow)
Actions
Normal operation
-
Reverse phase
Switch off the unit. Check the 3 phase wiring.
T phase missing
Switch off the unit. Check the 3 phase wiring.
S phase missing
Switch off the unit. Check the 3 phase wiring.
R phase missing
Switch off the unit. Check the 3 phase wiring.
High pressure
High discharge pressure. Check the refrigerant system.
Low pressure
Low suction pressure. Check the refrigerant system.
Overheat
High discharge temperature. Check the refrigerant system.
Sensor missing
+
Switch off the unit. Plug in sensor.
ON
OFF
Fast Blink
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7/10/20 10:35:16 AM
7/10/20 10:35:16 AM