Mitsubishi Electric PVA-A12 AA7 Manuel D'installation page 24

13.5. ERV (energy recovery ventilation)
ERV Control
Sequence of operation:
1. The ERV demand switch closes CNER
2. 12VDC is provided to CN2C to turn on ERV
3. If the unit goes into defrost, CN2C stops 12VDC output
ERV Switch:
Non-Voltage a-contact input
Contact rating voltage >= 15VDC
Contact rating current >= 0.1 A
Minimum applicable load <= 1mA at DC
ERV output
Condition
CNER input
Cool/Heat/Fan operation
OFF Defrost
STOP
Cool/Heat/Fan operation
ON Defrost
STOP
RC: Remote controller
24
Part Number: PAC-740
max 30 ft.
CN2C output
Fan speed
(=Fan output)
RC setting
STOP
STOP
RC setting
STOP
STOP
ON
OFF
OFF
ON
OFF
ON