Haier AB092XCERA Service Manual page 94

3.7.4 Defrosting operation flow chart
fixed frequency
compressor
outdoor motor
4-way valve
Spray valve SV2 OFF
all EEVs
all indoor motors ON
3.8 Frequency control when Td is too high
Purpose: make compressor frequency control if the discharging temp. is too high, to lower the discharging
temp. efficiently and ensure the system can run normally.
120℃
115℃
110℃
105℃
100℃
95℃
beginning
indicated FQY 60s
0HZ
5s
ON
OFF
ON
OFF
ON
450-pulse
auto open angle
OFF
If keeping for 10s, the unit stops, 3 minutes later, the unit can
re-startup. If in 60 minutesthe unit occurs alarm for 3 times, the
failure can be eliminated.
Reduce FQY rapidly 2HZ/S
Reduce FQY rapidly 1HZ/S
Reduce FQY slowly 1HZ/10S
Remain FQY
Increase FQY slowly 1HZ/10S
end
defrosting FQY 80 Hz（E）
send defrosting signal to indoor
350-pulse(E)
- 94-
60s soft startup
0HZ
Auto
15s
450-pulse
auto open angle
anti-cold air function