SAMUEL JACKSON HO-7-1237, Руководство по обслуживанию

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PAGE 14 of 61 HO-7-1237 & HO-4-1234 OIL-FIRED HEATERS
© SAMUEL JACKSON, INCORPORATED 2003 ALL RIGHTS RESERVED
ALARM 421
MOMENTARY LOW AIR FLOW: This ALARM is an indication that a choke of the
airflow is occurring. It is displayed when the air flow switch goes off and comes back on
in less than 3 seconds.
ERROR 422
LOW AIR FLOW MORE THAN 3 SECONDS: This ERROR occurs when the airflow is
interrupted for more than 3 seconds. Verify proper airflow and adjust switch if
necessary.
ERROR 425
OIL LOW PRESSURE: The oil pressure fell below 45 psi. Check fuel pump rotation
when restart is attempted. If fuel pump rotates correctly, check the following: Check for
empty oil supply tank. Look for a closed valve in the supply pipe. Clean both of the oil
filter screens (in the lower cabinet and on the burner). Check for oil leaks which could let
air leak into supply pipe and cause pressure to fluctuate. Run the test program to adjust
the oil pressure. Remember that the oil pressure determines the maximum heat output and
that the oil pressure should be adjusted equal to the air pressure. Oil pressure higher than
air pressure can result in smoky operation and difficulty in starting.
ERROR 426
OIL HIGH PRESSURE: A shutdown due to this error is to preve nt rupturing the fuel line
hoses from high oil pressure (over 90 psi). Check to see if the Fuel Pressure Relief Valve
(FPR) is jammed shut or its discharge connection is closed off. If this is not the case,
check to see if the Oil High Pressure Switch (OHP) has been adjusted to a pressure lower
than the setting of the FPR.
ERROR 430 *
OIL LOW PRESSURE SWITCH FAILED: The Oil Low Pressure Switch (OLP) failed to
turn off when the fuel pump was off. Check the OLP to see that its contacts have not been
bridged and that it is adjusted properly. Run the test program to check its adjustment.
ERROR 431
LOW ATOMIZING AIR PRESSURE: The atomizing air pressure fell below 45 psi. This
may be caused by an inadequate air compressor, a closed valve in the supply line or an
unusual usage of compressed air elsewhere in the plant. Dependable air pressure is
essential for the proper operation of the burner. The pressure shown on the air pressure
gage in the cabinet should be equal to the oil pressure, normally about 60 psi.