Chapter I: Indoor Unit and Main board for Outdoor Unit
Notice:
During operations under any mode, if short circuit, open circuit and other
malfunctions of the temperature sensors are detected, the main engine should
come to a halt immediately.
1. Outdoor-board:
1.1.Forced cooling operation switch:
Short circuit this switch before electrifying, data communication to indoor unit
will be ignored:
Forced cooling will function, the 3-minute delay will be cancelled, and the
following output will be ON simultaneously:
High wind volume (H) for outdoor fan motor;
Compressor operates at the frequency of 80Hz.
1.2.Forced heating operation switch:
Short circuit this switch before electrifying, data communication to indoor unit
will be ignored:
Forced heating will function, the 3-minute delay will be cancelled, and the
following output will be ON simultaneously:
High wind volume (H) for outdoor fan motor;
Compressor operates at the frequency of 80Hz.
CPU checks all A/D ports
B
．
When safeguarding action happens outdoors, the actions in A should be
OFF, and other inputs are independent of the actions in A.
C
．
LED output: Goes along even if safeguarding action happens outdoors;
Cut this switch and go back to the original state. (The out-door safeguarding
action will continue)
Chapter II: Basic Functions
3. Cooling mode
3.1.The four-way valve does not work (not electrified)
3.2.The discharge temperature sensor will not be tested within five minutes
after the compressor is started
3.3.Outdoor fan motor control: The fan motor starts five seconds after the
compressor starts, switching conditions for the two gears of wind volume are
as follows: T ambient temp. <21
℃
, Low wind volume
T ambient temp. >21
℃
, High wind
volume When the fan motor starts up, and
the ambient temperature is at the return difference (
±
2
℃
), it runs at the low
wind volume.
3.4.Compressor control: Frequency range: 30HZ---------120HZ
T ambient temp. <16
℃
, the maximum frequency is
65HZ 16
℃≤
T ambient temp.
≤
30
℃，
the maximum
frequency is 90HZ
30
℃≤
T ambient temp.
≤
41
℃，
the maximum frequency is
110HZ
T ambient temp.
≥
41
℃，
the maximum frequency is 85HZ
Actual temperature and frequency maybe adjusted through EEPROM
34
Model:
HSU-12HS03/R2(DB)
HSU-09HS03/R2(DB)Domestic Air Conditioner
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