62-61753-21
34 ENGINE FAILED TO STOP
TRIGGER-ON: In engine mode, engine is turning more than 500 RPM for 20 seconds after unit shut
down or cycled off or Oil Pressure Switch is closed longer than 20 seconds after unit shut down or
cycle off.
UNIT CONTROL: Engine operation: engine and unit shutdown and alarm.
Standby operation: this alarm will not activate in standby operation.
RESET CONDITION: Alarm may be manually reset via keypad or by turning the unit off, then back on
again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (Refer to See Note 1 Page 7-1) Operate the unit through the appropriate modes to see if any active
alarm occurs. Continue with the steps below as necessary.
a. Verify that engine is still running.
Engine should not be running.
Check For Bad Engine RPM Sensor Alarm
Alarm conditions must be corrected and the alarm
cleared to continue.
Check Engine Oil Pressure Switch Wiring
a. Inspect switch & connector pins &
terminals. (See wiring schematic
Section 10.)
No physical damage to harness.
No damaged or corroded pins.
b. Check switch circuit
Check for voltage at the switch
plug between pins A (+) and B
(ground).
Energize circuit (refer to Note 2 Page 7-2).
Voltage should be approximately 12 VDC.
Check Engine Oil Pressure Switch
b. Remove switch, connect to an
external pressure source and test.
Contacts close on a pressure rise when pressure is
above 1.02 bar (15 psig).
Contacts open on a pressure fall when pressure is
below 0.82 bar (12 psig).
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