TCL TAC-07CHSA/XA71 Service Manual page 13

b. When the indoor fan motor running at a low-speed under cold air prevention operation, once
auxiliary electric heating works, the vane immediately withdraws from the cold air prevention
location and turn back to normal vane angle. While auxiliary electric heating stops, indoor fan motor
goes on to run at low-speed accordingly, the vane turns to cold air prevention location
Stop the fan motor
10.2 Failure code
The following table shows the fault protections.
When failures happens, the PCB alarms and buzzer rings three times, Failure code shows on
display board, and the PCB operates protection procedures.
Failure code: For the machine with LED display (88), the code shows on LED, for machine without
LED, the code reflects by the running light.
Failure
RT Sensor Failure
IPT Sensor Failure
System Protection
System Protection(high/low pressure
protection model)
Indoor Fan Motor Failure
While failure happens, the code displayed statically, if there are several failure codes reported at
the same time, then failure codes appears by turns every eight seconds correspondingly.
a. Sensor's failure protection: when the sensor tested temperature out of the range ---
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50°C≤T≤110°C, sensor failure is determined.
Once RT and/or IPT sensor failure appears, the compressor stops, and indoor and outdoor fan
motors shut off. Remote controller doesn't response to any signal except for shutdown. During failure
the machine can run in fan mode. After the failure is settled, the PCB restores to standby status.
b. Failure protection of Indoor PG fan motor: If there is no feedback signal of rotated speed within 5s,
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the indoor fan motor stops, meanwhile, the compressor, outdoor fan motor, four-way valve and/or
auxiliary electric heater etc. also cut down.
The indoor fan motor restarts again 10 seconds later, if still there is no feedback signal of rotated
speed within 5 seconds, the A /C stops and goes into indoor fan motor failure protection, buzzer
rings three times, and running light flashes at 6 times per 8 seconds. Once there is feedback signal
while the failure recovery, the failure will relieve automatically.
Air Conditioner Service Manual
Set fan speed
34°C
25°C
Low speed
Figure 5 Cold air prevention
Set fan speed
32°
C
27°
23°C
Stop the fan motor
Low speed
Running Light Flash
Once / cycle
Twice / cycle
4 times/cycle
/
6 times / cycle
LED Display (88)
E1
E2
E4
E5
E6
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