Haier GE APPLIANCES NF80D045S3A Service Manual page 20

Proper Ground and Voltage
A poorly grounded furnace can contribute to premature
ignitor failure. Use the following procedure to check for
ground and voltage to the integrated control.
1. Measure the AC voltage between Line Neutral (spade
terminals) and "C" terminal (low voltage terminal
block) on the integrated control. See Figure 16. A wide
variation in the voltage between Line Neutral and "C"
as a function of load indicates a poor or partial ground.
Compare the readings to Table 10. If the readings
exceed the maximum shown in Table 10, make repairs
before operating the furnace.
CHECK VOLTAGE BETWEEN LINE NEUTRAL
AND LOW VOLTAGE "C" TERMINAL
Red LED
Recall
2. In addition, measure the AC voltage from Line Hot
to Line Neutral (spade terminals) on the integrated
control. See Figure 16. This voltage should be in the
range of 97 to 132 VAC
Furnace Status
Power On Furnace Idle
CAI / Ignitor Enerigized
Indoor Blower Energized
CHECK VOLTAGE BETWEEN LINE HOT
AND LINE NEUTRAL
Red LED
Recall
Figure 16.
Page 20
Measurement VAC
Expected Maximum
0.3
0.75
Less than 2
Table 10.
31-5000736 Rev. 0
2
5
10