28
Servicing should only be performed by a Qualifi ed Service Agent
TROUBLESHOOTING
TEST 2: POLARITY CHECK
Conditions:
No hot water•
Green “Power” LED is on.•
Tank is more than 5° F below temperature dial setting.•
Red ignition control board diagnostic LED is flashing 6 times between pauses.•
Red, diagnostic “Call for Heat” LED-OFF.•
Figure 20
BY INSTALLER
FACTORY INSTALLED
120 VAC CIRCUIT
1a 1 1b
GROUND
TO EARTH
EARTH GROUND
NEUTRAL
HOT 120 VAC
BK
W
W
R
R
R
R
BL
BR
SENSOR
IGNITOR/FLAME
Ground
120 V.
Figure 21
TEST 2
Polarity Check
Check from on/off switch center and white wire terminals to ground
IF......... then............
115-125 VAC is not present see Test 1.
Voltage is present white (right terminal) to ground
but not black (center terminal) to ground
reverse supply wire connections. Polarity is reversed.