Lennox G26 Series User Manual

Page 50
F−BCC2 Blower Control −1 and −2 Models
CHECK:
1−UNIT POWER
2−INTERLOCK SWITCH
3−TRANSFORMER
4−LIMIT SWITCH
START
IS
24VAC ACROSS
R & T?
YES
JUMPER ACROSS
SCREWS R & G
YES
DOES UNIT
OPERATE?
NO
NO
IS
BLOWER
RUNNING ON HIGH
SPEED?
NO
IS
120VAC ACROSS
N1 & A?
REPLACE
BCC2
NO
YES
YES
CHECK BLOWER
WIRING AND
BLOWER
IS
120VAC ACROSS
N1 & ACC?
NO
REPLACE
BCC2
YES
JUMPER ACROSS
R &W
(REMOVE R & G JUMPER)
IS
COMB. AIR BLOWER
ON?
NO
REPLACE
BCC2
NO
IS
120VAC ACROSS
N1 & CAB?
CHECK
COMBUSTION
AIR BLOWER
YES
YES
ARE BURNERS
LIT?
NO
CHECK:
1−COMBUSTION AIR BLOWER
2−IGNITION CONTROL
3−GAS VALVE
4−IGNITOR
5−LIMIT SWITCHES
6−PROVE SWITCH
YES
IS BLOWER
RUNNING ON LOW
SPEED, 45 SEC.
AFTER FURNACE
LIGHTS?
NO
IS
120VAC ACROSS
N1 & H?
YES
IS
24VAC ACROSS
T & V?
REPLACE
BCC2
NO
NO
CHECK
WIRING
YES
IS
120VAC ACROSS
N1 & ACC?
YES
REMOVE
R & W
JUMPER
AFTER
THE SELECTED
TIME, DOES THE
BLOWER TURN
OFF?
YES
NO
YES
REPLACE
BCC2
END OF TEST
BCC2
TROUBLESHOOTING
FLOWCHART
NO
REPLACE
BCC2
CHECK BLOWER
WIRING AND
BLOWER
FIGURE 55
CHECK CIRCUIT
BREAKER. RESET IF
NECESSARY.

Lennox G26 Series Specifications

General

Brand	Lennox
Model	G26 Series
Category	Furnace
Language	English