Polarity Check; Continuity Check Of High Limit - State Water Heaters SBN 71-120NE Service Handbook

SBN TANK TYPE COMMERCIAL GAS WATER HEATER
TEST 2 - POLARITY CHECK - continued
TEST 2
If...
115-125 VAC is not present
voltage is present white (right terminal) to
ground but not black (center terminal) to
ground
TEST 3 - CONTINUITY CHECK
OF HIGH LIMIT (ECO)
Conditions:
Power On – No Hot Water
Red, heater control "Call for Heat"
LED – on
Red, ignition control board
diagnostic LED – 4 Flashing
Note LED Flash Code before
resetting heater.
See Description of diagnostic
LED Flashes.
Turn Power "Off"
Continued on next page
©2003
SERVICE HANDBOOK

Polarity Check

Check from on/off switch center and white wire terminals to ground
...then
see Test 1.
reverse supply wire connections - polarity is
reversed.
28
Technical Training Department
Ashland City, Tennessee