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Haier AP242ACAAA Technical Manual page 40

Cabinet air conditioner
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(7) Auxiliary electric heater control
Auxiliary electric heater starts work on condition that the following conditions are
met simultaneously (Tr is room temperature, St is setting temperature in the following
selectable conditions):
a. Tr 23
b. Tr St-2
Note: after starting electric heater, fan motor won't run at low speed.
In case that one of the following conditions is met ,close auxiliary electric heater:
a. Tr>23
b. Receive closing signal of electric heater
c. Compressor or indoor fan motor stop working
d. Tr
(8) Anti-freezing function
At cooling state, according to indoor coiled temperature, air conditioner control the
operation of outdoor fan motor and compressor on the following conditions:
Heat bump
Stop compressor, fan motor
Cooling only
Stop compressor, fan motor
(9) Stand by for three minutes
When compressor stops running caused by sensor off, open and shut machine or
breakdown, compressor will maintain at stop position for three minutes. If power fail
is no more than 3 minutes, compressor will maintain also at stop position for three
minutes after remaking current.
(10) Overload protection for heating running
Anti-overloading protection: at heating state, according to indoor coiled temperature,
air conditioner control the operation of fan motor on the following conditions.
Outdoor fan motor:
Indoor fan motor
Over-current protection: at heating state, according to system working current
measured by current transformer, air conditioner control outdoor fan motor and
compressor on the following conditions:
St-1
Low fan speed
-1
-2
Normal fan speed
45
53
56
Setting fan speed
45
53
High fan speed
1
7
High fan speed
7
Stop fan motor
Stop compressor
70
2min
Low speed invalid
Medium speed invalid
59
63
26

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