Trane 4TXK6512G1000AA, Service Manual

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6. water pump and flow switch control
1): Water pump will be electrified when indoor unit enters non-heating mode until indoor unit stops. 5 minutes
later after indoor unit stops, water pump will stop.
2): When indoor unit is in heating mode, water pump will not operate.
3): In the cooling standby, heating and air supply modes, the pump does not run when the float switch is
closed. After the water tank is full, the float switch is turned off, and the controller detects this signal and after 2
seconds, the pump starts to work. After the float is restored, the pump continues to work for 5 minutes;
4) After continuously detecting the water full signal for more than 5 minutes, the compressor stops working;
after the compressor stops, the water pump continues to run for 5 minutes. If the float switch is still
disconnected, the drainage system is reported to be faulty. After the fault, the water pump continues to run until
the float switch is detected to be closed. After 5 minutes of lag, it turns to normal operation mode.
7. Timer operation
A: Wired control type: wired controller will control the unit ON/OFF;
B: Remote control type: indoor unit will confirm the unit ON or OFF according to the current clock and the
timer clock set by remote controller. When setting timer function, the timer LED will be ON.
8. Sleep Function
A: The ON/OFF for Wired control type unit is controlled by wired controller
B: Remote control type unit includes cooling sleep and heating sleep, after the sleep is set, the unit will
change mode; the sleep will begin to count.
a: In cooling/dry mode, after running for 1 hour, the set temp. will increase 1oC, another 1 hour later, the set
temp. will increase 1oC again, then 6 hours (or set time-2) later , it will stop.
b: In heating mode, after running for 1 hour, the set temp. will reduce 2oC, another 1 hour later, the set temp.
will reduce 2oC again, then 3 hours later, the set temp. will increase 1oC, and another 3 hours(or set time-5), it
will stop.
9. Auto-Restart Function
A. Wired control type unit: Please refer to the DIP switch setting SW4: ON means auto-restart unavailable;
OFF means auto-restart available(SW4=OFF is factory default setting)
B. Remote control type unit:
In 5 seconds, press SLEEP button 10 times continuously in 5 seconds, the buzzer will beep 4 times and enter
auto-restart function. Within 5 seconds, press SLEEP 10 times continuously, the buzzer will beep twice and quit
auto-restart function
C. Memory information: ON/OFF state, mode, fan speed, set temp., health, swing position;
D: If the memory includes timer or sleep function, when being electrified again, timer and sleep will be cancelled;
10. Compulsory Defrosting Operation
A: After indoor receives the compulsory defrosting signal, it will send continously the signal to outdoor for 10
times, in this period, indoor unit will work normally and it will enter defrosting operation until it receives the enter-
defrost signal from outdoor unit.
B: Wired control type: receive the compulsory defrosting signal to enter compulsory defrosting.
C: Remote control type: In heating mode, high speed, 30oC, press SLEEP button 6 times in 5s, and the buzzer
will sound 3 times, then enter the manual defrosting.
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