PAGE 19 of 61 HO-7-1237 & HO-4-1234 OIL-FIRED HEATERS
© SAMUEL JACKSON, INCORPORATED 2003 ALL RIGHTS RESERVED
ERROR 462
HIGH TEMPERATURE LIMIT WIRING ERROR:
This ERROR means that the electrical
signal for the high temperature limit controller alarm contact is not present when the
burner is doing the pre- flame checks. Check wire connections and that the correct UDC-
3300 controller (17090A) is installed and configured for the before mix-point
temperature control position in the 20000 TEMPERATURE CONTROL. Also verify that
the thermocouple connections are good and polarity correct.
ERROR 463
AIR HIGH TEMPERATURE LIMIT EXCEEDED:
This ERROR will shut the burner
down due to an excessively high air temperature before the mix point which the
modulating control is unable to constrain. The limit is normally set to 415
°
F (212
°
C).
This ERROR is common in systems that are deficient in air volume, systems that have
chokages at the mix-point, or both.
ERROR 464
HIGH TEMPERATURE AT BURNER HEAD:
This ERROR will shut the burner down
due to a high temperature condition sensed in the air inlet area above the burner head.
This temperature sensor will only be exposed to flame or excessive heat when air through
the heater is suddenly interrupted, causing the flame to go in a direction other than the
outlet. Verify that the Burner Head Temperature Switch (BHT) is set at 190
°
F (88
°
C).
ALERT 470
LOW PLC BATTERY:
This ALERT indicates that PLC battery needs to be replaced. A
dead PLC battery does not affect burner operation but will result in a reset of time, date
and some custom settings and clearing of the Error Log if supply power is turned off for
several hours. Alerts are not logged.
ALARM 472
FLAME SIGNAL LASTS TOO LONG
AFTER SHUTDOWN:
This ERROR means that
flame is detected for more than 15 seconds following the tolerated afterburn period. Look
at the fuel flowmeter (FF) to see if the Fuel Oil Valve (FOV) in the lower cabinet is
closing properly. See if oil pressure is within the recommended range (60 to 80 psi).
ALARM 480
HOT BOX TRASH GATE OPEN MORE THAN 20 SECONDS:
This ALARM is optional
for users of the Samuel Jackson Hot Box II. The pivoting trash gate on the Hot Box has
remained open for more than 20 seconds allowing outside air to leak into the drying
system. This condition greatly hurts the performance of the drying system. Check for
junk jamming the trash gate open.
