16
HL-Series Tankless Heater
Installation
3/29/2018
Bradley •
215-1823 Rev. F; ECN 18-17-017
Troubleshooting for Controller
Problem
Solution
No Power
Verify power is on .
Turn power off . 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 system temperature limit control to make sure
it has not activated due to excessive heat exchanger
temperature or faulty sensor .
Turn power off . Check for loose or disconnected wires .
Check the incoming service connection . Voltage must
match name plate rated voltage . Labels are located on the
upper left of back plate (Serial Number Label) .
Alarms do not occur .
Make sure alarm set points are correct .
Make sure alarm is not latched .
Make sure alarm side settings are correct .
Make sure alarm type settings are correct .
Make sure alarm controller is not in diagnostic mode .
Alarms do not clear .
Check power limit setting .
Check operation mode .
Check alarm output function .
Check temperature setting .
