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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 sequencer
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.
PHASE PROTECTOR (OPTIONAL)
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.
•
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.
STANDARD OPERATING CONDITIONS
Cooling
Temperature
Ts °C
Th °C
Minimum indoor temperature
16
11
Maximum indoor temperature
32
23
Minimum outdoor temperature
16
11
Maximum outdoor temperature
46
24
Heating
Temperature
Ts °C
Th °C
Minimum indoor temperature
16
-
Maximum indoor temperature
30
-
Minimum outdoor temperature
-5
-6
Maximum outdoor temperature
24
18
Ts: Dry bulb temperature. Th: Wet bulb temperature.
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7/19/12 2:34:28 PM
