Mitsubishi Electric PURY-P200 Service Handbook page 107

(3) BC controller (Cooling only, heating only, cooling main, heating main operations)
3
Cancellation of the self-
holding of protection function
Fan mode
Solenoid valve OFF,
LEV fully close
Cooling only
operation
❉Note 1: Error modes include errors on the indoor unit side, and errors on the BC controller and outdoor unit sides. If there are
problems on the indoor unit side, only the indoor units will stop. If there are problems with either on the BC controller
or outdoor unit side, all indoor units, BC controller, and outdoor units will stop their operations.
Start
NO
Breaker
turned on
YES
NO
Operatio n
command
YES
1. Judgment of operation mode
(Cooling only, heating only, combination
of cooling/heating)
2. Signal sent to outdoor units
Reception of signal indicating operation
modes from outdoor units
Note 1
YES
Error mode
NO
Combination of cooling/
heating operation
Operation
mode
All units in the
same mode
Operation
mode
Heating only Cooling main
operation
3
- 104 -
Operation
mode
Heatin main
operation operation
Normal operation
Trouble observed
Stop
Error signal sent to outdoor units
Error stop
Self-holding of protection function
Error signal sent to indoor units