Haier HFU-09H03/R2(DB) Service Manual page 39

and the outdoor fan motor returns to its original state;
The above temperature points, frequency-decreasing step and time interval can
all be adjusted through EEPROM
III. Anti over-loading operation while heating:
5.3.When the operation frequency F 40HZ, if the temperature of the outdoor
coiled pipe T
outdoor coil
operation and the operation frequency of the compressor should be decreased by
2Hz then examine the temperature of the outdoor coiled pipe at 10-second
intervals, if T
outdoor coil
until the frequency is the lowest;
During the frequency-decreasing operation, if 47
compressor and the fan motor keep their original states;
When T 46 , the compressor runs at the normal operating frequency,
outdoor coil
and the outdoor fan motor returns to its original state;
5.4.When the operation frequency F 40HZ, if the temperature of the outdoor
coiled pipe T
outdoor coil
operation and the operation frequency of the compressor should be decreased by
2Hz then examine the temperature of the outdoor coiled pipe at 10-second
intervals, if T
outdoor coil
until the frequency is the lowest;
During the frequency-decreasing operation, if 52
compressor and the fan motor keep their original states
When T 51 , the compressor runs at the normal operating frequency,
outdoor coil
and the outdoor fan motor returns to its original state;
The above temperature points, frequency-decreasing step and time interval can
all be adjusted through EEPROM
6.. Compressor discharge safeguard:
5 minutes after the compressor starts, when the compressor temperature
rises above 105 , decrease the compressor frequency by 2HZ/stop for 10
seconds, until the compressor temperature falls below 90 , the compressor
returns to normal operation;
When the compressor temperature rises above 115
should stop at once, wait until the compressor temperature falls below 90
and the waiting time period exceeds 3 minutes, the compressor returns to
normal operation;
After the compressor restarts, if the compressor temperature rises above
115 once more within 15 minutes, the compressor should stop at once
and give an alarm.
The temperature points are stored in EEPROM
Domestic Air Conditioner
52 , the outdoor fan motor performs forced high-speed
52 , decrease the operation frequency further by 2 Hz
57 , the outdoor fan motor performs forced high-speed
57 , decrease the operation frequency further by 2 Hz
37
T
outdoor coil
T
outdoor coil
, the compressor
38
HFU-12H03/R2(DB)
Model: HFU-09H03/R2(DB)
52 , the
52 , the