State Industries SANDBLASTER SBD85 500 - Manual (Page 20)

SBD TANK TYPE HEATERS
SERVICE HANDBOOK
Technical Training Department
Ashland City, TN ©2003
19
TROUBLESHOOTING SBD WATER HEATERS
To troubleshoot a SBD water heater check that:
• 120 VAC is supplied to the heater
• the tank is full of water
• gas is supplied to the unit
STEP 1 TEST THE TRANSFORMER
STEP 1 - TO TEST THE TRANSFORMER - Using a multimeter, test for 24 VAC
between the secondary transformer terminals.
N E H T F I
The meter does not read 24 VAC: • Check that the 120 VAC is supplied
from the On/Off Switch – if not, replace
switch.
• Check that the 120 VAC is supplied
from transformer.
The meter reads 24 VAC: • Go to step 2.