Mitsubishi Heavy Industries SCM50ZS-S1 - Current Cut; Outdoor Unit Failure; Discharge Pipe Sensor Disconnection Protection Control; Regulation of Outdoor Air Flow

(14) Discharge pipe sensor disconnection protection control
(a) When the compressor speed is other than 0 rps.
(i) Tho-D(10)
- Tho-D(0) < 8 °C, and Tho-D(10) - Tho-A(10) < 5 °C
The compressor speed is set on
A
rps for 5 minutes. After 5 minutes, the compressor speed is set on
B
rps for 5 minutes.
(ii) Tho-D(20) - Tho-D(15) < 5 °C
The compressor speed is set on 0 rps.
(b) Once the unit is stopped by this function, it is not restarted.
Notes (1) Tho-D(X): After compressor operation, the discharge pipe temperature sensor after X minutes.
(2) Tho-A(X): After compressor operation, the outdoor air temperature sensor after X minutes.
Model
A
B
30 rps
60 rps
SCM50
20 rps
60 rps
SCM60
(12) Current cut
(a) Purpose
(b) Detail of operation
(13)
Outdoor unit failure
(23) Indoor fan motor protection
compressor
(SRF:150)
300
-
• Values of
A
,
B
(15) Regulation of outdoor air flow
(a) The fan operates as follows according to the compressor speed. (Except during defrost operation.)
◆Model SCM60
◆Model SCM50
CoolingHeating
Compressor speed (rps)
Less than 30 61 or more
Outdoor fan speed
6th speed
More than 30
but 61 or less
5th speed4th speed
Less than 30 48 or more
6th speed
More than 30
but 48 or less
5th speed4th speed
CoolingHeating
Compressor speed (rps) Less than 61 61 or more
Outdoor fan speed
6th speed5th speed
Less than 48 48 or more
6th speed5th speed
(b) If the outdoor unit’s fan speed drops, the outdoor fan is run for 1 minute at that speed.
(16) Serial signal transmission error protection
(a) Purpose
(b) Detail of operation
(17) Rotor lock
(18) Outdoor fan motor protection
(19) Outdoor fan control at low outdoor temperature
Cooling
(i)
(i)
(ii)
(a)
Operating conditions
(ii) Detail of operation
Outdoor air temperature > 10˚C
Outdoor air temperature
<
=
10˚C
Outdoor fan
Outdoor air temperature > 16˚C
Outdoor air temperature
<
=
16˚C
Lower limit speed
Tho-A
Tho-R
) (SCM60 : 40 )
(SCM60 : 40 )
(SCM60 : 40 )37
37
37
min
-1
1
2
Tho-R
(iii) Reset conditions
37
Tho-R
Tho-A
3
1
2
-
temperature
Lower
(SCM60 : 40 )
-
191
-
'18 • SCM-T-251