Lennox EL195UHE Unit Information page 18

P49
5
4
3
2
1
N
G
L
C
Test 1
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 up-
stream of plug P48 and proceed to test 3.
P49
5
4
3
2
1
N
G
L
C
P48
Test 2
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−Meter
(set to VAC)
12 12
0 0
P48
Multi−Meter
(set to VAC)
24
Test 3 (if necessary)
Check for 120 volts across terminals CIRC" and Neutrals"
on the integrated control. If voltage is present, problem is
with the harness. If voltage is not present problem may be
may be with the integrated control.
Test 4 (if necessary)
Check for 24 volts across terminals 24 COM" and FAN" ter-
minals 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
FIGURE 16
Page 18
Multi−Meter
(set to VAC)
12 12
0 0
Multi−Meter
(set to VAC)
24