Monitor 41 - Component Voltage Readings

MONITOR HEATING SYSTEMS
Section 6: Troubleshooting
Monitor 4221441 Component Voltage Readings
COMPONENT READING TAKEN AT AC DC
Thermistor Q on PCB Sensor disconnected 5
-- -
Thermistor Q on PCB Sensor connected 1.53.2
Air Pressure Switch,' Connector J 11 0
Overheat Protector Closed
Air Pressure
Switch,' Connector J 0
Overheat Protector Open
Damper
Solenold I on PCB 105
Solenoid Pump K on PCB pulse'
C~rculat~on Fan High Speed RD to BK(M-422) 110
WH to BK(M-441) 110
Circulation Fan Low Speed RD to BK(M-422) 93
WH to BK(M-441) 9l
Igniter B on PCB 110
Power Transformer AC 120V 110
(primary side)
Power Transformer AC 120V 120
(secondary s~de) AC 12V 12
Combustion Blower F on PCB 110 I
High Speed
Combust~on Blower F on PCB 921M-422)
Low Speed (Ql is Off) ~~(~-441)
Res~stor G on PCB 1WM-422)
22(M41)
*Pulse can only be measured with a hlgh impedance d~gltal volt meter.