Functions and control
When Tpg_indoor begins to rise again, and ice_temp_2
≤
Tpg_indoor
≤
ice_temp_3
℃
, the frequency of
thecompressor doesn’t change.
When ice_temp_3
〈
Tpg_indoor
〈
ice_temp_4
℃
, the frequency of the compressor increases at the speed of
1HZ/10seconds.
For example, Tpg_indoor
≤
0
℃，
last for 2 minutes, and then the outdoor unit will stop, and report underload
malfunction, but don’t send malfunction report to the indoor.
The compressor stops for more than 3 minutes, Tpg_indoor> ice_temp_4
℃
, the compressor recovers.
7.1.5.6
：
The frequency limitation of modification rate
In the field which is controlled by high frequency, if the modification rate is not high enough, the
control-driven chip will enter into weak magnetic control, this will help to relieve the problem of modification
rate. If during the course of weak magnetic control, the modification rate is still not high enough, enter into the
control of decreasing frequency until the alarm of modification rate is relieved.
7.1.5.7
：
Temperature protection of the outdoor refrigerating coil
When the defrosting temperature and the sensor’s temperature are higher than 68
℃
, the frequency of the
compressor decreases 1hz/10seconds. Keep the frequency until it decreases to the lowest frequency. When
the temperatures are lower than 68
℃
and higher than 61
℃
, keep the frequency of the compressor. When
the temperatures are lower than 61
℃
, relieve the defrosting temperature protection.
7.1.5.8
：
Malfunction display and malfunction handling
a)
、
For the complete appliance’s malfunctions
：
Annex 2
If there’s malfunction with the outdoor unit, the light of the outdoor unit will flash and its frequency is 1HZ, the
number of times is according to the table, when a round of flashing is finished, the light shoud be off for 5
seconds.
b)
、
For the units’ malfunctins
：
Annex 1
If there’s malfunction with the units, this will not affect the run of the complete appliance, but this can be
displayed by the malfunction light, the light flashing frequency is 0.5HZ, the number of times is according to
the malfunction table of the indoor units. When a round of flashing is finished, the light shoud be off for 10
seconds. Then report according to the order : unit A
→
unit B
→
unit C
→
unit D, that is, if there’s malfunction
with several units, then just report the indoor unit with the highest priority level. Among the unit malfunctions,
the priority level of the communication malfunction is the highest, for others, that appears first will have the
priority.
Remarks: in 3 minutes when the compressor stops, the units’ malfunctions are not displayed; the
complete appliance’s malfunctions are prior to the units’ malfunctions.
Annex 1
：
Malfunction codes of the whole unit
Remarks: under the mode of refrigeration, the malfunctions of each unit’s thin pipe temperature sensor are
not reported, under the mode of heating, the malfunctions of each unit’s thick pipe temperature sensor are
not reported.
F12
1
Outdoor EEPROM error
F1
2
The protection of IPM
F22
3
Overcurrent protection of AC electricity for the outdoor model
F3
4
Communication fault between the IPM and outdoor PCB
F19
6
Power voltage is too high or low
F4
8
Overheat protection for exhaust temperature
Domestic air conditioner
21
