Serial Signal Transmission Error Protection - Mitsubishi Heavy Industries SRK20ZJX-S Service Manual

Model 40: Less than 40
Model 45: Less than 40
Compressor speed (rps)
Model 50: Less than 48
Model 60: Less than 48
Outdoor fan speed
SCM71, 80 ZJ-S
Compressor speed (rps) Less than 31
Outdoor fan speed
3rd speed
(b) If the outdoor unit's fan speed drops, the outdoor fan is run for 1 minute at that speed.

(18) Serial signal transmission error protection

(a) Purpose:
(b) Detail of operation:
(19) Rotor lock
(20) Outdoor fan motor protection
(21) Outdoor fan control at low outdoor temperature
Cooling
(a) Operating conditions:
(b) Detail of operation:
(c) Reset conditions:
Heating
(a) Operating conditions:
(b) Detail of operation:
Cooling
Model 40: 40 or more
Model 45: 40 or more
Model 50: 48 or more
Model 60: 48or more
5th speed 6th speed
Cooling
More than 31 More than 46
but 46 or less but 66 or less
4th speed 5th speed
Outdoor air temperature > 10˚C
Outdoor air temperature < = 10˚C
Outdoor air temperature > 16˚C
Outdoor air temperature < = 16˚C
Model 40: Less than 56
Model 45: Less than 56
Model 50: Less than 61
Model 60: Less than 61
5th speed
More than 31
66 or more Less than 31
but 66 or less
6th speed 3rd speed 4th speed
Outdoor fan
Lower limit speed
39
- -
Heating
Model 40: 56 or more
Model 45: 56 or more
'10 • SCM-SM-094
Model 50: 61 or more
Model 60: 61 or more
6th speed
Heating
More than 66
85 or more
but 85 or less
'09•SRK-DB-087D
5th speed 6th speed