Trane 4TXM2318BF300AA Service Manual page 113

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: In heating mode, make a jumper for D2 to enter compulsory defrosting.
C: Remote control type: In heating mode, high speed, 30
3 times, then enter the manual defrosting.
Trial Operation
A: Enter condition
a: Wired control type: In OFF state of COOL or HEAT mode, press ON/OFF button for over 5 seconds to enter the
cooling or heating trial operation;
b: Remote control type: In OFF state, keep pressing ON/OFF button until 5 seconds later, the buzzer sounds twice,
then enter the cooling or heating trial operation;
B: Response in trial operation
a: Cooling trial operation: indoor sends S-CODE=SD to outdoor, indoor: at high speed, set temp: 16
b: Heating trial operation: indoor sends S-CODE=SF to outdoor, indoor: at high speed, set temp: 30
c: In this period, anti-freezed and overheat functions are invalid.
C: Quit condition
a: Receiving the signal of cancelling trial operation from wired controller or remote controller;
b: After trial operation has run for 20 minutes, it will quit trial operation automatically and enter the normal mode
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with the set temp.: 24 C.
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.
SLEEP Function
A: Wired control type unit is without sleep function;
B: Remote control type unit consists of 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 1
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set temp. will increase 1 C 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 2
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reduce 2 C again, then 3 hours later, the set temp. will increase 1
c: When setting sleep function, indoor motor is forced at low speed.
Healthy Negative lon Function
When receiving the healthy signal from the wired controller or remote controller, if fan motor is running, the negative
ion will work;
If the fan motor stops, the negative ion generator will stop.
Auto-Restart Function
A: Wired control type:
YR-E17:Please refer to the DIP switch setting SW4: ON means auto-restart unavailable; OFF means auto-restart
available(SW4=OFF is factory default setting)
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C, press SLEEP button 6 times, and the buzzer will sound
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C, another 1 hour later, the
o C, another 1 hour later, the set temp. will
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C, and another 3 hours(or set time-5), it will stop.
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C;
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C;