Connections To The Heat Pump Regulator (Accessories And Options) - Fujitsu WSYA050ML3 Design & Technical Manual

4-3. Connections to the heat pump regulator (Accessories and
Options)
RELATED LINKS
"Wiring diagrams" in Chapter 2. HYDRAULIC INDOOR UNITS on page 02-5
¢ Connection terminals
 Heat pump regulator RVS21.827
Terminal
X75
X80
X82
X83
X84
X86
X30
X50
X60
X70
X100
NOTE: Colored items are for options.

4-3. Connections to the heat pump regulator (Accessories and Options)

Low voltage
M GND (common with interface PCB)
DI7 HP error
DI6 Defrost
Uref
Compressor modulation
UX3
D3 HP operation on/off
DO2 HP operation mode (HEAT/COOL)
BX1 Flow sensor
M Common
BX2 Return sensor
UX1
Not used
M
Heating circuit pump signal
BX3
DHW sensor
M
BX4
Outdoor sensor
M
1
2 Room thermostat or Remote control
3
B1
M Room thermostat
B2
Not used
User interface
RF module
LPB clip
Regulation extension kit (UTW-KREXD)
- (03-71) -
Use
4. Electrical connections