17
Installation
SNA-Series Tankless Heater
Bradley •
215-1815 Rev. E; ECN 16-17-016
6/10/2016
Troubleshooting for Controller
Problem
Solution
No Power
Verify power is on .
Turn off power . Check continuity of all internal fuses in
control transformer, heating elements or optional Fused
Disconnect circuits .
Check all field service circuit breakers or fuses .
Check the safety interlock door switch to make sure
that lack of power is not due to misadjustment or open
enclosure door .
Check system temperature limit control to make sure
it has not activated due to excessive heat exchanger
temperature or faulty sensor .
Turn off power . Check for loose or disconnected wires .
Check the incoming service connection . Voltage must
match name plate rated voltage . Labels are located on
the cabinet door and on upper left of back plate (Serial
Number Label) .
