–
27
–
‘19 • KX-SM-318
(c) Fan control during heating
During heating, fan speed is controlled in accordance with the low pressure (sensed by PSL).
(i) Initial fan speeds are as follows.
• Outdoor fan initial speed during heating
Model
Speed
All models
6th speed
(ii) During normal operation, the speed is changed in accordance with the low pressure value.
(4)
Defrost operation
• Temperature condition of defrost operation
(a) Starting conditions
Defrost
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 defrost operation 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 abo
①
When the outdoor heat exchanger temperature (sensed by Tho-R) and the ambient air temperature (sensed by
Tho-A) dropped below the defrost operation start temperature in Fig. 1 for 30 seconds continuously
②
When the suction pressure saturated temperature calculated by the low pressure (sensed by PSL) and the ambient
air temperature (sensed by Tho-A) dropped below the defrost operation start temperature in Fig. 2 for 30 seconds
continuously
TR: Heat exchanger temperature (°C)
TA: Ambient air temperature (°C)
TA: Ambient air temperature (°C)
Fig. 1
Cold region
Standard
(Factory setting)
Defrost operation 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 operation start zone
-6
-10
-19
-23
-25
-29
-20
-15
6
Without J15
Cold region specification
With J15
(b) Ending conditions
Defrost operation stops when a
(i) When 12 minutes has passed since defrost operation started
(ii) When the outdoor heat exchanger temperature (sensed by Tho-R) is detected 12°C or higher continuously for 10
seconds
(iii) When it has detected the high
pressure (HP) ≥ 3.0MPa
(5) Protective control
(a) Discharge pipe temperature control
If the discharge pipe temperature exceeds 105°C, compressor speed is reduced to suppress the rising of discharge pipe
temperature.
(i) If the discharge pipe temperature sensor detects 115°C or higher for 2 seconds continuously, it makes compressor
stopped. And if this anomaly occurs 5 times within 60 minute, it makes the unit anomalous stop. (E36-1)
(ii) If the discharge overheat sensor (Td-DST) detects 5degC or lower for 10 minutes continuously, it makes compressor
And if this anomaly occurs 3 times within 60 minutes, it makes the unit anomalous stop. (E36-3)
(b) High pressure control
(i) Compressor rotation speed protection control
①
If high pressure sensor (PSH) detects 3.70MPa or higher, it makes compressor rotaion speed decreasing.
②
If high pressure sensor (PSH) still detects 3.70MPa or higher 5 seconds after
①
control, it makes compressor
rotation speed decreasing more.
③
If high pressure sensor (PSH) detects lower than 3.70MPa, this protective control is released.
(ii) High pressure protective control
If high pressure switch (63H1) is activated or if high pressure sensor (PSH) detects 4.14MPa or higher for 10
seconds continuously, it makes compressor stopped (High pressure anomaly).
And if this anomaly occurs 5 times within 60 minute, it makes the unit anomalous stop.(E40)
(c) Low pressure control
(i) Compressor rotation speed protection control
①
If low pressure sensor (PSL) detects 0.18MPa or lower for 10 seconds continuously, it makes compressor
rotaion speed decreasing.
②
If low pressure sensor (PSL) still detects 0.18MPa or lower 30 seconds after
①
control, it makes compressor
rotation speed decreasing more.
③
If low pressure sensor (PSL) detects higher than 0.236MPa, this protective control is released.
(ii) Low pressure protective control
If low pressure sensor (PSL) detects 0.134MPa or lower for 30 seconds continuously, or if it detects 0.003MPa or
lower for 5 seconds continuously, it makes compressor stopped (Low pressure anomaly).
And if this anomaly occurs 5 times within 60 minutes, it makes the unit anomalous stop.(E49)
(d) High pressure ratio protective control
①
If pressure ratio is 8.0 or higher, it makes compressor rotaion speed decreasing.
②
If pressure ratio is 8.0 or higher 60 seconds after
①
control, it makes compressor rotation speed decreasing more.
③
If pressure ratio is 7.9 or lower, this protective control is released.
(e) Over-current protection control (Current safe)
(i) Compressor capacity control
①
Compressor speed is controlled by detecting the inverter’s T-phase current or secondary current.
②
The control is changed at every ambient air temperature zone.
Ambient air temperature (ºC)
[Fig. 1]
Zone D
Zone C
Zone B
Zone A
34
36
38
40
43
45
Summary of Contents for FDC121KXZEN1
Page 159: ... 158 19 KX SM 318 ...
Page 161: ... 160 19 KX SM 318 ...
Page 162: ... 161 19 KX SM 318 ...
