Blodgett SB-E Series - Manual (Page 20)

18 OM-E-SB
Troubleshooting
Do not operate the unit if it malfunctions or has damaged or broken parts. Steam boilers are designed to operate smoothly and ef-
ficiently when maintained properly. However, the following is a list of checks to make if there is a problem. Electrical schematics are
provided in this manual, and inside the unit electrical enclosure. IF THE ITEM ON THE LIST IS MARKED WITH (X), THE
WORK SHOULD ONLY BE DONE BY A FACTORY-AUTHORIZED SERVICE REPRESENTATIVE.
SYMPTOM WHO WHAT TO CHECK
Boiler does not fill with water. User a. Is water supply connected and is water present?
b. Is water pressure low (less than 30 PSI)?
c. Is strainer screen (if used) clogged?
d. Is on/off switch in base cabinet turned on? Is the amber light in
the on/off switch “ON”?
e. Is the manual drain valve open?
Authorized
Service Rep Only
f. Is the Water Level Control Board defective? Check for loose
electrical connections on water fill solenoid. (X)
g. Is the water fill solenoid valve defective? (X)
h. Is the solenoid drain valve open or leaking? Check for loose
electrical connections on solenoid drain valve. (X)
Boiler overfills with water. User a. Is the boiler level? Check levelness of unit with a spirit level.
b. Is the water pressure too high? (Greater than 60 PSI?)
Authorized
Service Rep Only
c. Is the Water Level Control Board defective? Check for loose
electrical connections on “hi” water fill solenoid. (X)
d. Is the water fill solenoid valve defective? (X) Check for debris on
valve seat.
e. Is the “hi” water probe sensing level? Clean water level probe
and probe well (located in boiler). (X)
Boiler under fills with water. User a. Is the boiler level? Check levelness of unit with a spirit level.
Water enters boiler slowly. User a. Is strainer screen (if used) clogged?
b. Is the water pressure too low? (Less than 30 PSI)?
c. Is the water supply line too small?
Authorized
Service Rep Only
d. Is the water fill solenoid defective? (X)
RESET light does not come
on.
Authorized
Service Rep Only
a. Is the Is the Water Level Control Board defective? Check for
loose electrical connections on “mid” water fill solenoid. (X)
b. Is the “mid” water probe sensing level? Clean water level probe
and probe well (located in boiler). (X)
c. Is the indicator light defective? (X)
Heater(s) will not come on. Authorized
Service Rep Only
a. Are contactors defective? (X)
b. Is the heater burned out? Check voltage and amperage on each
line at each heater. (X)
c. Is the contactor control relay defective? Note: Relay controls all
contactor coils. (X)
Heater(s) does (do) not shut
off after reaching operating
pressure.
Authorized
Service Rep Only
a. Is the pressure gauge defective? (X)
b. Is the operating pressure switch defective? No adjustment is
allowed. Replace the switch if defective. (X)
c. Are the contactors defective? (X)
d. Is the contactor control relay defective? (X)