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1.3.6 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.
1.3.7 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>10oC;
2) Indoor unit will send “pre-heat” signal to wired controller in anti-cold air period.
1.3.8. Fan motor control in defrosting
A.
On receiving outdoor defrosting signal, indoor unit will stop after blowing remaining heat at slow speed for 20
seconds.
B. In defrosting period, indoor fan motor stops running.
C. Defrosting is over, and indoor motor will run as anti-cold air state.
1.3.9 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.
1.3.10 Swing motor control
Indoor unit will control the swing motor according to the swing signal from the wired controller.
1.3.11 Water pump control
A: 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.
B: When indoor unit is in heating mode, water pump will not operate.
C: In OFF state and in any mode, once float switch signal is measured, indoor unit will send OFF signal to
outdoor and send the failure code of drainage system to the wired controller, then the water pump will work until
the float switch signal is cancelled. After water pump is forced to run for 5 minutes, indoor unit will be back to
normal state.
Full OFF 54
º
0
°
Standard position in
HEAT, COOL mode
Swing range
54
°
Summary of Contents for AB25S2SC1FA
Page 1: ...SYJS 04 2017 REV A Edition 2017 04 service manual R32...
Page 3: ...1 Part 1 General Information 1 Indoor outdoor unit models 2 2 Feature 3...
Page 23: ...21 5 Installation For AB25S2SC1FA AB35S2SC1FA 1 Installation procedure...
Page 24: ...22 AB25S2SC1FA AB35S2SC1FA AB25S2SC1FA AB35S2SC1FA...
Page 25: ...23...
Page 26: ...24...
Page 27: ...25 AB25S2SC1FA AB35S2SC1FA...
Page 28: ...26...
Page 29: ...27 For AD25S2SC1FA AD35S2SC1FA Installation procedure AD25S2SS1FA AD35S2SS1FA...
Page 30: ...28 AD25S2SS1FA AD35S2SS1FA AD25S2SS1FA AD35S2SS1FA...
Page 31: ...29...
Page 32: ...30 AD25S2SS1FA AD35S2SS1FA...
Page 33: ...31...
Page 38: ...36 21mm AD50S2SM1FA AD71S2SM1FA Unit model The size of drain opening...
Page 39: ...37...
Page 54: ...52 2 Dimension 1U71S2SM1FA 860 633 unit mm...
Page 91: ...89 R32 R32 R32 R32 R32 R32 R32 R32 R32 10 2 Read before installation...
Page 92: ...90 3 R32 R32 R32 R32 R32 R32 R32...
Page 93: ...91 R32 R32 R32 R32 R32 R32 R32 R32 10A HFC 410A...
Page 96: ...94 10 5 Air tightness test...
Page 97: ...95 R32 R32 10 6 Vacuuming...
Page 123: ...121 PCB 0011800410RA 1U71S2SG1FA Power module 0011800377C 1U71S2SG1FA...