Blodgett SB-E Series - Manual (Page 21)

OM-E-SB 19
Troubleshooting
SYMPTOM WHO WHAT TO CHECK
Boiler builds pressure but
shuts down. RESET light
comes on.
User a. Is the water level below the “mid” water level probe? Verify that
the water supply is sufficient to maintain the water level at or above
the “mid” water level probe.
Authorized
Service Rep Only
b. Is the operating pressure switch defective? No adjustment is
allowed. Replace the switch if defective. NOTE: If the high-limit
pressure switch has shut down the unit, it should not be restarted
until the problem which caused the shut-down has been corrected.
(X)
c. Is the “mid” water level probe unable to detect water? Clean the
water level probe and probe well (located in the boiler). (X)
Safety relief valve opens. Authorized
Service Rep Only
a. Are the operating pressure switch and/or high-limit pressure
switch defective? No adjustment is allowed. Replace defective
switches. (X)
b. Is the safety relief valve defective? Replace with ASME approved
15 PSI valve with “HV” marking. (X)
Boiler blows down
immediately when turned off.
Authorized
Service Rep Only
a. Is the thermostatic switch defective? Check for loose electrical
connections on switch. (X)
Boiler does not drain. Authorized
Service Rep Only
a. Is the thermostatic switch defective? (X)
b. Is the solenoid drain valve defective? (X)
c. Are the solenoid drain valve or hoses blocked? (X)
Boiler does not build pressure
with heaters on.
User a. Is the steam power take-off valve open or leaking?
b. Is the pressure gauge defective?
Authorized
Service Rep Only
c. Is the air vent leaking steam? (X)
d. Is the solenoid or manual drain valve open or leaking?
NOTE: Excessive make-up water added to the boiler reduces
steam production. (X)
Timer control will not operate. User a. Is the electrical supply turned on?
b. Is the ON/OFF switch in the base cabinet turned on?
c. Is boiler started? Is the green light in the ON/OFF switch lit?
d. Are any fuses blown?
No steam to cavities. User a. Has steam pressure developed?
b. Is steam supply turned on?
c. Is the door closed? (Doors must be closed before steam will
enter the cavity).
Door leaking steam or water. User a. Are the drain holes at the rear of the cavity blocked?
b. Does the door gasket need replacement?
c. Is the door latch in need of adjustment?
(See the Maintenance section).
d. Is the unit level?
Excessive steam coming from
the vent pipe.
User a. Is the water supply turned on?
b. Is the condenser hose kinked or obstructed?
c. Is the condenser spray solenoid working?