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Installation
Troubleshooting for Controller
Problem
No Power
Bradley • 215-1814 Rev. G
Solution
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) .
8/1/2021
CNA-Series Tankless Heater
17
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