CleaverBrooks WB, Owner'S Operation And Maintenance Manual

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750-136
Model WB Electric Boiler Manual 5-1
CHAPTER 5
Troubleshooting
5.1 — Problems, Causes, and Actions
Troubleshooting should be performed only by a qualified technician who is familiar with the equipment and who has
read and understands this manual. Failure to heed this warning could result in serious personal injury or death.
During troubleshooting, when possible, disconnect and lockout the main power to avoid the hazard of electrical
shock, which could result in serious personal injury or death.
Problem Possible Cause Action
Pilot switch set to “power on,” pilot
light off.
•
Main power supply not on.
• Control transformer fuse is blown.
•
Control transformer inoperative.
• Pilot light burned out.
•
Energize power supply.
• Check for loose connections, then
replace fuse.
•
Check for proper wiring/loose
connections, replace transformer.
• Check for loose connections,
replace light.
High pressure/temperature alarm
pilot light on.
•
Pressure/temperature has
exceeded setpoint on auto reset
limit control.
• Pressure/temperature has
exceeded setpoint on manual
reset limit control.
•
Allow pressure/temperature to fall
below setpoint less control differ-
ential. Raise setting if necessary,
but not above design limit or
manual reset setting.
• Allow pressure/temperature to fall
below setpoint less control differ-
ential. Depress reset button.
Raise setting if necessary, but not
above design limit.
!
Warning