Mitsubishi Electric SRK100VNPZJX, Technical Manual

Page: 323 / 509

-
322
-
'12 • PAC-T-174
(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.
Note (1) Value in ( ) are for the model 200, 250.
Release
Discharge pipe temperature (°C)
100
（
105
）
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
（
90
）
115
（
135
）
Note (1) Value in ( ) are for the model 200, 250.
3) Reset of anomalous stop mode
As it drops to the reset value of 85°C (90°C) or lower for 45 minutes continuously, it becomes possible to restart
from the remote controller.
Note (1) Value in ( ) are for the model 200, 250.
(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.
(c) Heating high pressure protection
1) Protective control
a) As the indoor unit heat exchanger temperature (Th
I
-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 frequency
at every 30 seconds.
Reset
A
Indoor unit heat exchanger temp. (°C)
2) Anomalous stop control
Operation control function by the indoor unit controller - See the heating overload protection, page 306.
3) Adaptation to existing piping, stop control
If the existing piping adaptation switch, SW5-1, is turned ON, the compressor stops to protect existing piping when
the indoor unit heat exchanger temperature (Th
I
-R) exceeds the setting value.
Compressor stop
Reset
Indoor unit heat exchanger temp. (°C)
47 58
Control value A
54-60°C
Model
Existing piping adaptation switch: SW5-1 (SW8-1: model 80)
OFF (Shipping) ON
Control value A (°C)
100-140 48-54
46-52
200, 250 52-58
Note (1) Adaptation to existing piping is at ON.