Mitsubishi SCM40ZS-S Technical Manual page 198

2
b 1.50MPa High pressure sensor (HPS)
MPa,
3
c High pressure sensor (HPS) 2.72MPa
2.72MPa,
(iii) Reset conditions
3) Reset conditions:
a
1
b
2
(b)
Heating
(i) Operating conditions
(ii) Detail of operation
(iii) Reset conditions
(20) Outdoor fan control at overload
(a) Cooling
(i) Starting condition
When the outdoor air temperature (Tho-A) has risen higher than 41°C for 30 seconds continuously while the compressor is operating.
(ii) Contents of control
The outdoor fan is stepped up by 3 speed. (Upper limit 6th speed)
(iii) Reset condition
When the compressor is turned off or the outdoor air temperature (Tho-A) has dropped lower than 40°C.
(b) Heating
(i) Starting condition
When the outdoor heat exchanger temperature (Tho-R) has risen higher than 13°C for 30 seconds continuously while
the compressor is operating.
(ii) Contents of control
The outdoor unit fan is stepped down by 3 speed. (Lower limit is 2nd speed)
(iii) Reset condition
When the compressor is turned off or the outdoor heat exchanger temperature (Tho-R) has dropped lower than 10°C.
Lower
L
Outdoor air temperature > 16˚C
Outdoor air temperature > 16˚C
Outdoor air temperature < = 16˚C
Outdoor air temperature < = 16˚C
temperature
high pressure sensor (HPS) is 2.72MPa
Tho-A
Tho-A
Tho-A
Normal operation
OFF
Outdoor air temperature(ºC)
Normal operation
OFF
Normal operation
OFF
Outdoor air temperature(ºC)
Outdoor heat exchanger temperature(ºC)
Normal operation
OFF
Outdoor heat exchanger temperature(ºC)
Lower limit speed
Lower limit speed
3rd
Tho-R 37
2.72MPa
Tho-R
37
( )
Under control
ON
40 41
Under control
ON
Under control
ON
40 41
10 13
Under control
ON
10 13
197
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'16 • SCM-T-199
high pressure sensor 1.50MPa - 2.72
high pressure sensor is higher than