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133
2.3.12
.
Oil return operation control
Unitary:
A
Entering condition
When the compressor running frequency is lower than 58Hz continuously in all and outdoor
unit Tcm is lower than 50 degree for 5 hours, the system will enter oil return operation. In the
course of mode changeover, manual unit stop or protective unit stop, the time will be
accumulative. After compressor restarts up, the time will counted continuously. In counting
time for 5 hour, if the compressor running frequency is over 80Hz for 10 minutes continuously,
the time will be cleared. Also after the heating defrosting , the time will be cleared.
B
Procedure
Cooling mode: refer to “the oil return procedure in cooling mode”
Heating mode: refer to “the oil return procedure in heating
mode”
C
The protection treatment in oil return operation:
In the course of cooling oil return, because of all kinds of protection or abnormal unit stop,
after the unit restart, the time will not be cleared, the system need another oil return operation.
In the refrigerant flow course in oil return of cooling mode or after oil return, and within 5
minutes after the refrigerant being eliminated is over, the anti-freeze protection and low
pressure protection are invalid, other protection is valid.
In the course of heating oil return ,because of all kinds of protection or abnormal unit stop, the
system need not another oil return operation after the unit stop for 3 minutes and enter in
heating mode directly. In the course of changing to cooling oil return, the anti-freeze
protection and low pressure protection are invalid, other protection is valid.
Oil return procedure in cooling mode:
Send oil return signal
oil return beginning
oil return over
ref.eliminated 30s
80 Hz
(
E
)
40HZ
(
E
)
Inverter compressor auto FQY
300pulse
(
E
)
outdoor unit PMV
auto open angle
auto open angle
120pulse
(
E
)
Outdoor fan motor
auto operation
auto
(
TC or ambient control
)
auto operation
running indoor motor auto operation
auto
(
set fan speed
)
auto operation
stop indoor motor stop
stop
stop
4-way valve
OFF
OFF
OFF
60S
Содержание AB25S2SC1FA
Страница 1: ...SYJS 04 2017 REV A Edition 2017 04 service manual R32...
Страница 3: ...1 Part 1 General Information 1 Indoor outdoor unit models 2 2 Feature 3...
Страница 14: ...12 AB25S2SC1FA AB35S2SC1FA AD25S2SC1FA AD35S2SC1FA 420 370 892 850 185 640 90 760 152 2 Dimension unit mm...
Страница 23: ...21 5 Installation For AB25S2SC1FA AB35S2SC1FA 1 Installation procedure...
Страница 24: ...22 AB25S2SC1FA AB35S2SC1FA AB25S2SC1FA AB35S2SC1FA...
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Страница 27: ...25 AB25S2SC1FA AB35S2SC1FA...
Страница 28: ...26...
Страница 29: ...27 For AD25S2SC1FA AD35S2SC1FA Installation procedure AD25S2SS1FA AD35S2SS1FA...
Страница 30: ...28 AD25S2SS1FA AD35S2SS1FA AD25S2SS1FA AD35S2SS1FA...
Страница 31: ...29...
Страница 32: ...30 AD25S2SS1FA AD35S2SS1FA...
Страница 33: ...31...
Страница 38: ...36 21mm AD50S2SM1FA AD71S2SM1FA Unit model The size of drain opening...
Страница 39: ...37...
Страница 54: ...52 2 Dimension 1U71S2SM1FA 860 633 unit mm...
Страница 91: ...89 R32 R32 R32 R32 R32 R32 R32 R32 R32 10 2 Read before installation...
Страница 92: ...90 3 R32 R32 R32 R32 R32 R32 R32...
Страница 93: ...91 R32 R32 R32 R32 R32 R32 R32 R32 10A HFC 410A...
Страница 96: ...94 10 5 Air tightness test...
Страница 97: ...95 R32 R32 10 6 Vacuuming...
Страница 123: ...121 PCB 0011800410RA 1U71S2SG1FA Power module 0011800377C 1U71S2SG1FA...
Страница 182: ...Haier Commercial Air Condition Web Http www haier com Haier reserves the right to make change without any notice...