–
17
–
(5)
Defrost control
(a)
Temperature condition of defrosting
1)
Start conditions
(Standard specification or cold region specification can be selected by switching the jumper
wire J15.)
Defrost operation will start, when outdoor unit whose compressor is operating under heating mode has satisfied all
the following conditions.
(i)
When 33 minutes of cumulative compressor operation time has passed since heating operation started.
(ii)
When 33 minutes of cumulative compressor operation time has passed since the previous defrosting ended.
(iii)
When 8 minutes has passed since the compressor turned ON from OFF status.
(iv)
When 8minutes has passed since one outdoor fan turned ON from OFF status.
(v)
After all above conditions have been met, when any of the following conditions is satisfied.
➀
When the outdoor heat exchanger temperature (sensed by Tho-R) and the outdoor air temperature (sensed
by Tho-A) dropped below the defrosting start temperature in Fig. 1 for 30 seconds continuously
➁
When the suction pressure saturated temperature calculated by the low pressure (sensed by PSL) and the
outdoor air temperature (sensed by Tho-A) dropped below the defrosting start temperature in Fig. 2 for 3
minutes continuously
TR:
Heat e
xchanger temperature
. (°C)
TA: Outdoor air temperature. (°C)
TA: Outdoor air temperature. (°C)
Fig. 1
Cold region
Standard
(Factory setting)
Defrost start zone
-2
-6
-15
-19
-21
-25
-20
-15
6
Without J15
Cold region specification
With J15
SST
: Suction pressure saturated temperature
. (°C)
Fig. 2
Cold region
Standard
(Factory setting)
Defrost start zone
-6
-10
-19
-23
-25
-29
-20
-15
6
Without J15
Cold region specification
With J15
2)
End conditions
Defrosting operation stops when any of the following conditions is satisfied.
(i)
When 12 minutes has passed since defrost started
(ii)
When the outdoor heat exchanger temperature (sensed by Tho-R) is detected 10°C or higher continuously for
10 seconds
(iii)
When it has detected the high pressure (HP) ≥ 3.0MPa
(b)
Time condition of defrosting
1)
Start conditions
Defrosting operation start when all of the following conditions are satisfied.
(i)
When 33 minutes of cumulative compressor operation time has passed since heating operation started.
(ii)
When 33 minutes of cumulative compressor operation time has passed since the previous defrosting ended.
(iii)
When 105 seconds has passed since the compressor turned ON from OFF status in heating mode.
(iv)
When the oil return condition has been established
(v)
Following cases are excluded.
➀
When the upper limit frequency of the compressor protection start A or B is lower than the defrosting
frequency
➁
During the normal compressor protection start
2)
End conditions
Defrosting operation stops when any of the following conditions is satisfied.
(i)
When 12 minutes has passed since defrost started
(ii)
When the outdoor heat exchanger temperature (sensed by Tho-R) is detected 10°C or higher continuously for
10 seconds
(iii)
When it has detected the high pressure (HP) ≥3.0MPa
Summary of Contents for 112KXE6
Page 105: ... 101 Model FDC335KXE6 A PCB003Z035 shows local wining ...
Page 134: ... 130 PJF012D003 ...
Page 135: ... 131 ...
Page 139: ... 135 PJA012D751 b ...
Page 140: ... 136 ...
Page 206: ... 202 2 model type DIS model type HEAD ...
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