Haier 3U19FS1ERA Service Manual - Page 92

Control for discontinuous operation, Anti-cold air control, Fan motor control in defrosting, Swing

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>_]]VbTZR\ _^UZdZ_^Vb 6.4 In AUTO mode, when the indoor unit occurs abnormal operation, the indoor unit will keep OFF state, and the buzzer will not sound until the outdoor mode and the requested mode of indoor unit are the same. 6.5 COOL (included AUTO COOL), DRY, FAN are not abnormal mode. 6.6 HEAT and FAN are not abnormal mode. 7. Control for discontinuous operation After the unit starts up in cooling/heating mode, in 5 minutes, the compressor run/stop will not be controlled by the room temp., but after changing the set temp., if compressor stop condition can be met, the system will stop compressor immediately. 8. Anti-cold air control In heating mode, after compressor startup, the system will control indoor fan motor according to indoor coil temperature. Detailed operation is as below: Tc2(℃) 30(32) set speed 26(30) low speed 22(26) off 20(20) Note: 1) The data in the parentheses is the control point when Tao>10℃; 2) Indoor unit will send "pre-heat" signal to wired controller in anti-cold air period. 9. Fan motor control in defrosting 9.1 On receiving outdoor defrosting signal, indoor unit will stop after blowing remaining heat at slow speed for 20 seconds. 9.2 In defrosting period, indoor fan motor stops running. 9.3 Defrosting is over, and indoor motor will run as anti-cold air state. 10. Blowing remaining heat operation When the unit shuts off in heating mode or the thermostat is OFF, indoor motor will stop running after running at low speed for 30 seconds. 11. Swing motor control Indoor unit will control the swing motor according to the swing signal from the wired controller. Full OFF 54º 54° Swing range -91- Standard position in HEAT, COOL mode 0°

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6.4 In AUTO mode, when the indoor unit occurs abnormal operation, the indoor unit will keep OFF state,
and the buzzer will not sound until the outdoor mode and the requested mode of indoor unit are the same.
6.5 COOL (included AUTO COOL), DRY, FAN are not abnormal mode.
6.6 HEAT and FAN are not abnormal mode.
7. Control for discontinuous operation
After the unit starts up in cooling/heating mode, in 5 minutes, the compressor run/stop will not be
controlled by the room temp., but after changing the set temp., if compressor stop condition can be met,
the system will stop compressor immediately.
8. Anti-cold air control
In heating mode, after compressor startup, the system will control indoor fan motor according to indoor
coil temperature. Detailed operation is as below:
Tc2(
℃
)
30(32)
set speed
26(30)
low speed
22(26)
off
20(20)
Note:
1) The data in the parentheses is the control point when Tao>10
℃
;
2) Indoor unit will send “pre-heat” signal to wired controller in anti-cold air period.
9. Fan motor control in defrosting
9.1 On receiving outdoor defrosting signal, indoor unit will stop after blowing remaining heat at slow
speed for 20 seconds.
9.2 In defrosting period, indoor fan motor stops running.
9.3 Defrosting is over, and indoor motor will run as anti-cold air state.
10. Blowing remaining heat operation
When the unit shuts off in heating mode or the thermostat is OFF, indoor motor will stop running after
running at low speed for 30 seconds.
11. Swing motor control
Indoor unit will control the swing motor according to the swing signal from the wired controller.
±²³³´µ¶·¸¹ º·µ ±²»¼·½·²»´µ
Full OFF 54
º
0
°
Standard
position
in
HEAT, COOL mode
Swing range
54
°
-91-