Troubleshooting; Vsp2−1 Board; Viii Troubleshooting - Lennox G32V Series Service Literature

VIII− Troubleshooting
1− VSP2−1 Blower Control Board G32V−1 / −3 Units
COOLING MODE
END OF COOLING TEST
HEATING MODE
END OF TEST
DOES UNIT OPERATE?
YES
IS 24VAC ACROSS
R AND C?
PLACE JUMPER ACROSS R AND G.
IS BLOWER ON LOW SPEED AND IS
ON/OFF" LED−DS3 LIT? CFM" LED−DS4
LIGHT SHOULD BLINK ONCE FOR EV-
ERY 100 CFM SELECTED IN THE
TABLES ON PAGE 2.
IS 24 VOLTS PRESENT AT J73 IS 24 VOLTS PRESENT AT J73
PIN 12 ON VSP2 BOARD? PIN 12 ON VSP2 BOARD?
IN ADDITION TO R AND G,
JUMPER R AND DS.
IS BLOWER ON HIGH SPEED AND ARE DS1 AND
YES
DS3 LIT? DOES THE CFM" LED−DS4 LIGHT BLINK
ONCE FOR EVERY 100 CFM SELECTED IN THE
TABLES ON PAGE 2?
DOES UNIT OPERATE?
YES
IS 24VAC ACROSS
PLACE HTG. BLOWER" JUMPER IN POSITION #2.
PLACE JUMPER ACROSS R AND W1. WAIT 75
SECOND FOR PREPURGE AND FAN ON" DELAY.
IS BLOWER ON LOW SPEED AND IS ON/OFF" LED−
DS3 LIT? CFM" LED−DS4 LIGHT SHOULD BLINK
ONCE FOR EVERY 100 CFM SELECTED IN THE
TABLES ON PAGE 2.
IS 24 VOLTS PRESENT AT J73 IS 24 VOLTS PRESENT AT J73
PIN 12 ON VSP2 BOARD? PIN 12 ON VSP2 BOARD?
PLACE HTG. BLOWER"
JUMPER IN POSITION #1.
R AND W1 REMAIN JUMPERED.
DOES BLOWER SHIFT TO HEAT SPEED
AND IS HEAT" LED−DS2 ON? DOES THE
CFM" LED−DS4 LIGHT BLINK ONCE
FOR EVERY 100 CFM SELECTED IN
THE TABLES ON PAGE 2?
REMOVE JUMPERS
YES
AFTER THE SELECTED
TIME, DOES BLOWER
TURN OFF?
CHECK:
NO
NO 1−UNIT POWER
2−INTERLOCK SWITCH
3−TRANSFORMER
4−LIMIT SWITCH
YES
YES
NO
YES
NO
R AND C?
YES
NO
YES
NO
YES
NO
YES
NO
Page 81
NO
CHECK UNIT WIRING
AND IF CORRECT,
REPLACE VSP2−1.
REPLACE VSP2−1.
NO
CHECK UNIT WIRING
AND IF CORRECT
REPLACE THE
VSP2−1.
CHECK:
1−UNIT POWER
2−INTERLOCK SWITCH
3−TRANSFORMER
4−LIMIT SWITCH
1−CHECK UNIT WIRING AND IF
CORRECT, REPLACE VSP2−1.
2−BREAK AND REMAKE JUMPER
(R TO W1).
3−AFTER 30−35 SECOND
PURGE, IS 24VAC PRESENT
AT GAS VALVE?
REPLACE VSP2−1.
CHECK UNIT WIRING
AND IF CORRECT,
REPLACE VSP2−1.
REPLACE THE VSP2−1.