Lennox EL296UH045XE36B - Page 16

Page 16
1
2
3
4
5
C
L
G
N
Multi−Meter
(set to VAC)
P48
P49
12
0
12
0
Turn on power to unit. Check for 120 volts across terminals “L”
and “N” on input plug P48. If voltage is present continue to test
2. If voltage is not present problem may be may be upstream
of plug P48 and proceed to test 3.
1
2
3
4
5
C
L
G
N
Multi−Meter
(set to VAC)
P48
P49
24
Switch thermostat to CONTINUOUS FAN MODE. Check for 24
volts across terminal “C” on input plug P48and speed tap used for
continuous fan. (1, 2, 3, 4 or 5) on input plug P49. If 24 volts is not
present problem may be up stream of plug P49. Proceed to test
4.
Multi−Mete
r
(set to VAC
)
12
0
12
0
24
Multi−Mete
r
(set to VAC
)
Check for 24 volts across terminals “24 COM” and the “active
speed tap” on the integrated control. If voltage is present, prob
lem is with the harness. If voltage is not present problem may
be may be with the integrated control
Check for 120 volts across terminals “L1” and “Neutrals” on the
integrated control. If voltage is present, problem is with the har
ness. If voltage is not present problem may be may be with the
integrated control.
Test 1
Test 2
Test 3 (if necessary)
Test 4 (if necessary)
FIGURE 8