Mitsubishi Heavy Industries SCM50ZS-W User Manual

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68
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'19 • SCM-SM-281
(a) Operating conditions
When the outdoor air temperature (Tho-A) is 22°C or lower continues for 20 seconds while compressor command speed is
other than 0 rps.
(b) Detail of operation
(i) The lower limit of compressor command speed is set to
B
or
D
rps and even if the speed becomes lower than
B
or
D
rps, the speed is kept to
B
or
D
rps. However, when the thermostat becomes OFF, the speed is reduced to 0 rps.
(ii) The upper limit of compressor command speed is set to
A
or
C
rps, the speed is kept to
A
or
C
rps.
22 25
OFF
03
Upper limit C rps
Lower limit D rps
ON
ON
Upper limit A rps
Lower limit B rps
Outdoor air temperature(°C)
2624
Range 2
Range 1
Indoor air temperature(°C)
Item
Compressor speed
75
A
B
Release 30
12
60
C
40
Unit: rps
D
Values of A - D
(c) Reset conditions
When the either of the following conditions is satised
(i) When the outdoor air temperature (Tho-A) becomes 25°C or higher.
(ii) When the compressor command speed is 0rps.
(4) Heating high pressure control
(a) Starting condition
When the indoor heat exchanger temperature (Th2 (Thi-R1)) has risen to a specied temperature while the compressor is
turned on.
(b) Operating condition
Compressor command speed is controlled according to the zones of indoor heat exchanger temperature as shown by the
following table.
Th2 < P1 P1
<
=
Th2 < P2 P2
<
=
Th2 < P3 P3
<
=
Th2 < P4 P4
<
=
Th2
Compressor speed (NP)
Normal Retention NP–4rps NP–8rps N=0
Sampling time (s)
─ 20 20 20 ─
Unit: °C
Th2
NP
P1 P2 P3 P4
10
<
=
NP < 30
41 47 52 55
30
<
=
NP < 31
41 – 45 47 – 52 52 – 57 55 – 61
31
<
=
NP < 90
45 52 57 61
90
<
=
NP < 120
45 – 43 52 – 50 57 – 54 61 – 58
120
<
=
NP
43
50 54 58
(3) Cooling low outdoor temperature protective control

Mitsubishi Heavy Industries SCM50ZS-W Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SCM50ZS-W
Category	Air Conditioner
Language	English