-
325
-
'12 • PAC-T-173
(c)
Switching of defrosting control with SW3-1
1) If SW3-1 on the outdoor unit control PCB is turned to ON, it becomes easier to enter the defrosting operation. Use
this when installing a unit at snowing regions.
2) Control contents
a) It allows entering the defrosting operation under the defrosting condition A when the cumulative heating
operation time becomes 30 minutes. It is 37 [45] minutes at SW3-1 OFF (Factory default).
b) It allows entering the defrosting operation under the defrosting condition B when the cumulative heating
operation time becomes 25 minutes. It is 30 minutes at SW3-1 OFF (Factory default).
c) It allows the defrosting operation with the outdoor unit heat exchanger temperature (Tho-R) and suction
pressure saturation temperature (SST) being higher than normal.
Note (1) Figures in [ ] are for model 71.
(6)
Protective control/anomalous stop control by compressor’s number of revolutions
(a)
Compressor discharge pipe temperature protection
1) Protective control
As the discharge pipe temperature (detected with Tho-D) exceeds the setting value, the compressor speed (frequency)
is controlled to suppress the rise of discharge pipe temperature.
Retention
Reduces compressor
speed at each minute.
Release
Discharge pipe temperature (°C)
105
110
2) Anomalous stop control
a) If the discharge pipe temperature (detected with Tho-D) exceeds the setting value, the compressor stops.
b) When it is detected 2 times within 60 minutes or after continuous 60 minutes, including the stop of compressor,
E36 is displayed on the remote controller and it enters the anomalous stop mode.
Compressor stop
Compressor operation
Discharge pipe temperature (°C)
85
115
3) Reset of anomalous stop mode
As it drops to the reset value of 85°C or lower for 45 minutes continuously, it becomes possible to restart from the
remote controller.
(b)
Cooling high pressure protection
1) Protective control
a)
When the outdoor air temperature (Tho-A) is 40°C or higher and the outdoor unit heat exchanger temperature (Tho-R)
exceeds the setting value, the compressor speed (frequency) is controlled to suppress the rise of high pressure.
b) Control value A is updated to an optimum value automatically according to the operating conditions.
Reduces compressor
speed at each minute.
Reset
A
Outdoor unit heat exchanger temp. (°C)
2) Anomalous stop control
a) As the outdoor unit heat exchanger temperature (Tho-R) exceeds the setting value, the compressor stops.
b) If it is detected 5 times within 60 minutes or 65°C or higher continues for 60 minutes, including the stop of
compressor, E35 is displayed on the remote controller and it enters the anomalous stop mode.
Compressor stop
Compressor operation
Outdoor unit heat exchanger temp. (°C)
51
65
3) Reset of anomalous stop mode
As it reaches the reset value of 51°C or lower, it becomes possible to restart from the remote controller.
Control value A
54-60°C
Summary of Contents for FDC Series
Page 95: ... 94 12 PAC T 173 Models FDT100VF 125VF 140VF H H H H H C B A F G D G PJF000Z285 ...
Page 98: ... 97 12 PAC T 173 Models FDEN60VF 71VF C 2 C 1 A B A B D C 1 C 2 C 1 C 2 E G F B PFA003Z817 ...
Page 113: ... 112 12 PAC T 173 b Wireless remote controller RCN E1R 60 17 150 Unit mm ...
Page 278: ... 277 12 PAC T 173 ー K ...
Page 346: ... 345 12 PAC T 173 Power PCB 1BSU OVNCFS 4GRNCEG VJG 2 ...
Page 518: ... 517 12 PAC T 173 3 5 SUPER LINK E BOARD SC ADNA E F SL2NA E and SL3N AE BE to control ...
Page 519: ... 518 12 PAC T 173 ...
