Mitsubishi Electric R410A Service Handbook page 114

[5-2 Outdoor Unit Control ]
Emergency operation pattern (2 outdoor units)
Emergency operation pattern (3 outdoor units)
OC
OS1
OS2
Cooling
Emergency
operation
Heating
Maximum total capacity
of indoor units (Note 1)
(Note 1) If an attempt is made to put into operation a group of indoor units whose total capacity exceeds the maximum allowable capacity,
some of the indoor units will go into the same condition as Thermo-OFF.
(3) Ending the emergency operation
When communication is restored, the emergency mode is cancelled, and the units go into the normal operation mode.
HWE14080
OC failure
pattern
OC Trouble
OS Normal
Cooling
Emergency
Permitted Permitted
operation
Heating
Permitted Permitted
Capacity that matches
Maximum total capacity
the total capacity of the
of indoor units (Note 1)
operable outdoor units
OC failure OS1 failure OS2 failure
pattern pattern pattern
Trouble Normal Normal
Normal Trouble Normal
Normal Normal Trouble
Permitted Permitted Permitted
Permitted Permitted Permitted
Capacity that matches the total capacity of the operable outdoor units
- 105 -
OS failure
pattern
Normal
Trouble
OC, OS1 failure OC, OS2 failure
pattern pattern
Trouble Trouble
Trouble Normal
Normal Trouble
Permitted Permitted
Permitted Permitted
OS1, OS2 failure
pattern
Normal
Trouble
Trouble
Permitted
Permitted
GB