Circuit Board Diagrams - Mitsubishi Electric FRESH MASTER GUF-50RD4 Handbook

6. Circuit board diagrams

Circuit board diagrams and check points <FU-M05-D4>
1 GUF-50RD GUF-50RDH
4,
Supply fan
Exhaust fan
Supply fan
220-240 V AC
low
50 Hz
Exhaust fan
220-240 V AC
low
50 Hz
Solenoid value
Full-wave rectified
of 220-240 V AC 50 Hz
(GUF-50/100RDH
4
OA thermistor
Damper motor
220-240 V AC 50 Hz
Water sensor
Limit switch
RA thermistor
Gas pipe thermistor
Liquid pipe thermistor
LEV
LED3
On when M-NET line
power is on.
LED2
On when MA remote
controller power is on.
LED1
On when power is on.
GUF-100RD
4,
Fuse
Power supply
220-240 V AC 50 Hz
Address switch
Address switch
GUF-100RDH
4, 4
Function switch 3
Branch No. switch
─ 9 ─
16 to 23 V AC
Function switch 1
Function switch 2
External humidifier
control input
Operation monitor output
Error monitor output
when there is an error
MA remote controller
transmission cable
14 V DC
M-NET
transmission cable
12 V DC
M-NET
transmission cable
GND
5 V DC