Service Manual

 Product Features 6 
parameter of EEPROM. It’s value ranges from 21°F to 43°F.
• When T1-Ts>-∆T3, the compressor ceases operation.
• When T1-Ts<-
∆T3 2.7°F, the compressor continues
operation.
• When the AC is operating in mute mode, the
compressor operates at a low frequency.
• When the current exceeds the preset value, the
current protection function activates and the
compressor ceases operation.
3.5.2 Indoor Fan Control:
• When the compressor is on, the indoor fan speed can
be set to high, medium, low, or auto. And the anti-
cold wind function has the priority.
• Anti-cold air function
• The indoor fan is controlled by the indoor
temperature T1 and indoor unit coil temperature
T2.
T2
Setting fan speed
H
M+
M
L
Super slow
Fan off
TEL0+23-
TE1
TEL0+21- TE1
TEL0+19- TE1
TEL0+17- TE1
TEL0+15- TE1
TEL0+13- TE1
TEL0+18- TE1
TEL0+16- TE1
TEL0+14- TE1
TEL0+12- TE1
TEL0+10- TE1
TEL0
T1 ≥ 66.2°F
ΔTE1=0
59°F ≤ T1 ≤
64.4°F
ΔTE1=34.2°F-T1
T1<59°F ΔTE1=7.2°F
• When the indoor temperature T1 reaches the setting
temperature, the compressor continues operation,
the indoor fan motor runs at the minimum speed or
setting speed.(The anti-cold air function is valid).
• The indoor fan is controlled as below:
Setting fan
speed
Actual fan speed
H（=H）
H+(H+=H+G)
M(M=M)
M+(M+=M+Z)
L(L=L)
L+(L+=L+D)
H-（H-=H-G)
M-(M-=M-Z)
L-(L-=L-D)
T1-Td℃(℉)
L
H
M
-
• Auto fan action in heating mode:
T1-Td
3.5.3 Outdoor Fan Control:
Case 1:
• The outdoor unit will be run at different fan speed
according to T4 and compressor frequency.
• For different outdoor units, the fan speeds are
different.
Case 2:
• The outdoor unit will be run at different fan speed
according to T4.
• For different outdoor units, the fan speeds are
different.
3.5.4 Defrosting mode
Case 1:
• The unit enters defrosting mode according to the
temperature value of T3 and T4 as well as the
compressor running time.
• In defrosting mode, the compressor continues to run,
the indoor and outdoor motor will cease operation,
the defrost light of the indoor unit will turn on, and
the “
” symbol is displayed.
• If any one of the following conditions is satisfied,
defrosting ends and the machine switches to normal
heating mode:
• T3 rises above TCDE1.
• T3 maintained above TCDE2 for 80 seconds.
• Unit runs for 15 minutes consecutively in defrosting
mode.
Case 2:
• The unit enters defrosting mode according to the
temperature value of T3 as well as the compressor
running time.
• In defrosting mode, the compressor continues to run,
the indoor and outdoor motor will cease operation,
the defrost light of the indoor unit will turn on, and
the “
” symbol is displayed.