Gf1800 Component Voltage Readings - Monitor GF3800 Servise Manual

MONITOR HEATING SYSTEM
Section 5: Troubleshooting GFI
800
GF1800 Component Voltage Readings
COMPONENT READING TAKEN AT AC DC
Thermistor Q on PCB Sensor Disconnected 5
Therm'st
A
"
readin
9
s taken witn
components connected to PCB.
1 g
^
3 2
Q on PCB Sensor connected
Air Pressure Switch/
Overheat Protector Closed
c
Air Pressure Switch/
Overheat Protector Open J on P ^B
Damper Solenoid I on PCB
Gas Control Valve High mode P on PCB
Gas Control Valve Low mode P on PCB
Circulation Fan High Speed Red to Black
Circulation Fan Low Speed Red to Black
Ignition transformer E on PCB
Power Transformer AC 120V
(primary side)
H on PCB
Power Transformer AC1 1 V
(secondary side) Yellow to Yellow
Power Transformer AC 120V
(secondary side) Whrte to Wh,te
Power Transformer
AC22V(secondary side)
Combustion Blower High Speed F on PCB
Combustion Blower Low Speed F on PCB(Q1 is off)
Resistor G on PCB
Gas Solenoid Valve L on PCB
Gas Solenoid Valve M on PCB
0
110
105
NAT 8.5
LP 8.3
NAT 4.6
LP 5.6
110
93
110
110
11
120
22
110
88
22
105
105
45