Fujitsu UTZ-BD035B Technical Manual page 19

(2) When you want to operate using the energy recovery ventilator switch
Operation is performed simultaneously by air conditioner remote controller even when the energy recovery ventilator switch
is in the OFF state.
The energy recovery ventilator can be operated by energy recovery ventilator switch even when the air conditioner is in the
stopped state.
Indoor unit PC board
Relay circuit
Do not make connections to multiple indoor units by duct direct connection system.
Dust may be dispersed depending on the operation condition of the air conditioner.
Stopped
Dust
Power source
AC220-240V
50Hz
N L
Energy recovery
ventilator switch
ON
OFF
HIGH
LOW
HEAT EXCHANGE
NORMAL
Provided at the site
Operating
Room air
Room air
- (01-16) -
Energy recovery ventilator
terminal
L
N
SW1
SW2
COMMON
LOW
HIGH
DAMPER
Energy recovery
ventilator
External air