Fujitsu AUYG07LVLA Design & Technical Manual page 360

BASE HEATER
A base heater is a heating element that may be installed to melt the ice that may accumulate in
the condenser drain pan.
This output signal is produced when the outdoor temperature drops down to 2°C, and releases at
4°C.
Circuit diagram example
P.C.B
1
2
Connector
3
*1
4
*1: Connect to pin 1 and pin 3. No connection pin 2 and pin 4.
*2: The allowable Input Power is 25W or less.
P.C.B
1
2
AC240V
Connector
3
*1
4
*3: If a load greater than 25W is applied, a contactor or relay should be used to operate and control the base
heater.
Operation
Heater
status
Stop
Output signal
OFF
Parts (Optional)
Parts name
Model name
AC240V
ON
External connect kit
UTY-XWZXZ4
- (06 - 112) -
connected unit
Base heater
*2
connected unit
Base heater
*3
6. SYSTEM DESIGN