Toshiba HWS-G2601ENXR-E - Page 35

Domestic Hot Water Heat Pump Service Manual
34
Hygrostat Function – fan speed control
The air flow is automatically adjusted depending on the ambient air conditions or by manual
adjustments.
The fan constantly runs changing the speed level depending on the 0~10V input signal from
external humidity sensors, CO
2
sensors or human interface panel:
 When the input signal is from 0 to 3.3V, the fan switches to minimum speed level (from D5)
 When the input signal is from 3.3 to 8V, the fan switches to medium speed level (from D4)
 When the input signal is from 8 to 10V, the fan switches to high speed level (from D3)
Humidity / CO2 Sensor
Human Interface
Humidity / CO2 Sensor
Receiver
Room 1
Room 2
BLU
B (D-)
L
N
L
N
0V
0V
L
L
0V
0~10V Input
BT3
EB1
0V
0V
0V
FM
BT2
BT1
0V
0V
L
N
PE
230VAC ~ 50Hz
0V
A (D+)
0V BLU
0~10V PWM
YEL
High pressure switch.
Compressor STOP when
Pd ≥ 2.0MPa
Solenoid valve.
Solenoid ON for 2 min
before compressor
starts and during
system defrost
BRN
BLK
N
BLU
BLK
BRN
BRN
BLU