Mitsubishi Electric PQHY-P200YLM-A Service Handbook page 191

[ VII Control ]
(3) BC controller (cooling only, heating only, cooling main and heating main modes)
Protection function
self-holding cancelled.
Solenoid valves OFF
LEV Fully closed
Note 1. The system may go into the error mode on either the indoor unit side or the BC controller or heat source
unit side. If some of the indoor units are experiencing a problem, only those indoor units that are
experiencing the problem will stop. If the BC controller or the heat source unit is experiencing a problem,
all the connected units will stop.
2. Refer to the Service Handbook that came with CMB-WP**V-GA(B)1 for information about the Hybrid City
Multi system.
HWE15060
Start
Breaker
turned on
YES
NO
Operation
command
YES
1. Determination of operation mode
(Cooling only, Heating only, Mixture
of units in cooling and heating)
2. Transmitted to the heat source unit
Reception of operation mode
command from the heat source unit
*Note 1
Error mode
NO
Fan
Operation
mode
All units in the
same mode
Operation
mode
Cooling Only Heating Only
3
NO
YES
Mixture of units in cooling and heating
Operation
mode
Cooling Main Heating Main
- 182 -
Normal operation
Error
Unit in the stopped state
Error command to
heat source unit
Error stop
Self-holding of
protection function
Error command to
indoor unit
GB