Fujitsu AB F18LAT Series Service Instruction page 77

EXTERNAL OUTPUT
External electrical heater control output
Corresponding indoor units : Duct type
Contents of operation : A signal linked to heating operation, indoor fan ON, and compressor ON
Circuit diagram example
Indoor
control PC board
13.5 V
CN10*
1
2
*CN15 for high static pressure duct type
ON
Heating
operation
OFF
ON
Signal
OFF
Parts (Optional)
Model name
UTD-ECS5A
When heater is connected, clay is indispensable.
Wire (Heater output)
can be output.
* Signal ON / OFF is switched according to the set temperature and room
temperature difference.
Relay circuit
Signal
Procured at the site
Parts No.
9077359004
03-07
(Example) Heater
Relay
power
supply