SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 2 - POLARITY CHECK - continued
TEST 2
Polarity Check
Check from on/off switch center and white wire terminals to ground
If… | ...then | |
see Test 1. | ||
voltage is present white (right terminal) to | reverse supply wire connections - polarity is | |
ground but not black (center terminal) to | reversed. | |
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 | 28 | Technical Training Department |
Ashland City, Tennessee
