Mitsubishi Heavy Industries FDTCVA SERIES Technical Manual page 174

b) After starting for 30 seconds, the compressor will run at fi xed frequency within 2~4 minutes with Brps as the target speed.
Model
302
402 ~ 602
802, 1002
(ii) Compressor protective start III
Model FDCVA302
±
1) Basic conditions
30 minutes or longer passes after the power is turned on,and this is the 1st cumulative compressor startup time after
the power is turned on.
2) Contents of control
The contents and conditions of control are different in accordance with the following cases (A) (B) and (C)
3) Low-speed operation control in cooling and dehumidifying
a) Conditions of control
When the basic conditions and one of the following conditions
cooling or dehumidifying is implemented.
When cooling or drying operation mode is selected, and more than 6 hours passes after the power is turn on.
When cooling or drying operation mode is selected, and the ambient air temperature (Tho-A) is higher than 5°C.
(even though less than 6 hours passes after the power is turn on)
b) Contents of control
The compressor is operated at 20 rps for 10 minutes after starting.
4) Forced operation control in heating
a) Conditions of control
When the basic conditions and the following condition
mented.
When forced heating operation mode is selected, and the ambient temperature is lower than 5°C. (even though less
than 6 hours passes after the power is turn on)
b) Contents of control
The compressor is operated at 42 rps for 10 minutes after starting.
After the control
cooling mode for ??? minutes.
Then compressor is stopped again, and after 3 minutes stopping, it is restarted and operated at 20 rps for 10 minutes
in heating mode.
5) Low-speed operation control in heating
a) Conditions of control
When the basic conditions are satisfi ed and the heating mode is selected, the low-speed operation control in heating is
implemented.
b) Contents of control
The compressor is operated at 42 rps for 10 minutes after starting.
Operation mode
Cooling, dehumidying
Heating
Cooling, dehumidying
Heating
Cooling, dehumidying
Heating
is fi nished, the compressor is stopped and 3 minutes after stopping, the compressor is restarted in
173
-
A rps B rps
42 40
62 40
55 55
55 55
55 55
55 55
or are satisfi ed, the low-speed operation control in
are satisfi ed,the forced operation control in heating is imple-
-
C rps
35
40
55
55
30
30