Haier AB12CS1ERA Service Manual page 366

Cooling mode
o
100 C<discharging temp.
o
90 C< discharging temp.<=100
o
<=90 C
Heating mode
o
100 C<discharging temp.
o
90 C< discharging temp.<=100
o
<=90 C
3.2.3 4-way valve control in heating
Unitary: 50s later after compressor start up, the 4-way valve start to operate. When compressor stops or unit is
not in heating mode, the 4-way valve is closed after compressor stop for 2 minutes and 55s.
compressor ON
OFF
4-way valve ON
OFF
Multi: Protection when 4-way valve can not reverse in heating: 10 minutes later after compressor startup, if
indoor coil average temp. is below 15degree and keeps for 1 minute, the unit will stop and occur the 4-way
valve protection.
compressor ON
OFF
4-way valve ON
OFF
3.2.4 Electric heater control
If compressor has not run for a long time, the refrigerant will deposit on the bottom of compressor and mix with
the refrigeranr oil. When re-startup, because low pressure reduces, refrigerant will be segregated from the
refrigerant oil and cause soam in the oil, which will make compressor exhaust a lot of oil. Therefore please stop
heating the compressor bottom to ensure the low pressure in startup period should not go down greatly.
• Ambient temp. TA≤27degree, when compressor stops, the electric heater will be electrified.
• When TA≥32degree, or compressor running, the electric heater will be off.
Heater ON
Ambient temp. TA( ℃ )
3.2.5 Control of defrosting in heating
In heating mode, defrosting temp. sensor will check the frosting condition of outdoor heat exchanger and make
defrosting control.
A: Enter condition:
Unitary: After the unit is in heating for 10 minutes and compressor run for 45 minutes in all , according to check
+50degree/30seconds, it will stop until up to the max. permitted
opening angle
o
C Keep the angle
-5degree/30seconds, and reduce to 0 degree gradually
Indoor modification angle
+50degree/30seconds, it will stop until up to the max. permitted
opening angle
o
C Keep the angle
-5degree/30seconds, and reduce to 0 degree gradually
50 S（E ）
15 S（E ）
OFF
Indoor modification angle
2 minutes and 55s
2 minutes and 55s
27 32
364
Super Match