Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 17

�Heating � Cooling
Heating
FMo1,2
20S
SV6
EEVH1,2
EEVSC
CM1
CM2
(7) Crankcase heater control (Master unit/Slave unit)
(a) Crankcase heater ON (power on) and OFF (power off) are controlled with the under-dome temperature thermistor.
(b) Crankcase heater CH1 is turned ON, when the under-dome temperture (Tho-C1) < = (SST)+20°C
Crankcase heater CH1 is turned OFF, when the under-dome temperture (Tho-C1) < = (SST)+25°C
(c)
(d) Crankcase heater CH2 is turned ON, when the under-dome temperture (Tho-C2) < = (SST)+20°C
Crankcase heater CH2 is turned OFF, when the under-dome temperture (Tho-C2) < = (SST)+25°C
(e)
(Note) SST: Low pressure saturated temperature detected with low pressure sensor (LPS)
Crankcase heater CH1 is turned OFF, when the under-dome temperature (Tho-C1) < = － 40°C and CM1 is ON
(f)
(g) Crankcase heater CH2 is turned OFF, when the under-dome temperature (Tho-C2) < = － 40°C and CM2 is ON
(Note) (f) and (g) are the protection for thermistor (Tho-C1, -C2) breakage
Cooling
OFF
ON
3 minutes
OFF
Opening
degree control
Full-close
ON
OFF
OFF
Min. of 3 minutes
Compressor stop
Starting conditions are satisfied
ON
3 minutes
ON
Full-open
Initial opening degree
15 sec. 1 minute 45 seconds
Compressor start
15
- -
Open/close control
Opening
degree control