62-11389
7
−
33
Alarm
NO.
Steps
Alarm/Cause
Corrective Action
40
CHECK GLOW PLUGS (This alarm applies to the Intake Air Heater)
•
TRIGGER–ON: Engine Operation: Intake Air Heater amperage is less than 25 Amps,
or
greater
than 70 Amps after 14 seconds of glow time (NOTE: This can only occur when the
Engine Coolant Temperature is below 50
°
F (11
°
C) due to the glow
time allowed.
Refer to Table 4
−
1
for glow times.
Standby Operation: This alarm will not activate in standby Operation.
•
UNIT CONTROL: Alarm Only
•
RESET CONDITION: Auto Reset if glow plug amperage is between 4 to 55 amps for at least 14
seconds during the glow cycle, or 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, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
1
Check Model Number
Verify that the model number on the
nameplate matches the model
number shown in the microprocessor
Unit Data.
Enter the correct number in Configurations. (Refer to
Section 5.2.1.)
2
Check Glow Configuration
Verify that the Glow configuration is
set to INTAKE HEATER.
INTAKE HEATER must be the selection (Refer to
Section
5.2.1 for configuration settings.)
3
Check Air Intake Heater circuit
a. Inspect relay & socket.
No signs of discoloration from overheating.
No damage, moisture, or corrosion in socket.
b. Check operation of intake air
heater relay.
CAUTION
DO NOT leave the circuit energized for the full 5
minutes if full amperage is shown, as the intake air
heater element life will be greatly shortened.
Using Component Test Mode, refer to Section 5.2.2,
energize the intake air heater relay.
LED 30 must be illuminated.
Amperage must be correct, refer to Section 2.8 for
correct electrical values.
c. Check voltage to Air Intake
Heater.
Must be 11 VDC or higher.
4
Check Air Intake Heater circuit wiring
a. Inspect harness & control box
connector pins & terminals. (See
wiring schematic Section 10.)
No physical damage to harness.
No damage, moisture, or corrosion in connectors.
b. Check connection at Intake Air
Heater.
Ring terminal is tight on terminal.
No signs of overheating.
