Section 5 – SR-2 Diagnostics
40 CHECK HIGH SPEED CIRCUIT
Page 1 of 1
Alarm Type
Check or Shutdown Alarm (Pretrip Only)
Associated Alarm
Codes
None
Component Description and Location
The high speed solenoid is located at the rear of the injector pump.
Circuit Description
The high speed solenoid circuit is a two wire circuit. The 7D-01 wire connects the interface board connector J15 to
one side of the high speed solenoid. The CHHS wire connects the other side of the damper solenoid to chassis
ground. The solenoid is not polarity sensitive, but the suppression diode must be installed with the bar end of the
diode toward the 7D-01 wire. The switch wires are routed in the Main Harness. Power to the 7D-01 wire is
supplied by interface board fuse F6.
How Alarm is Set
1. This alarm is set if the measured shunt current is incorrect during a non running Pretrip Test. Current is
measured with the output on and off.
2. The alarm is set as a Check alarm if the current is not within specifications when the solenoid is energized.
3. The alarm is set as a Shutdown alarm if the current does not return to 0 when the device is de-energized.
How Alarm is Cleared
This alarm is cleared manually.
Diagnostic Procedure
1. Check the operation of the high speed circuit, using Interface Board Test Mode. Be sure the high speed
relay LED 5 lights.
2. Use the HMI control panel amps gauge to check the current drawn by the high speed solenoid, while
operating the high speed solenoid with Interface Board Test Mode. The current draw should be
approximately 4.6 amps.
3. Energize the high speed solenoid using Interface Board Test Mode, and check for battery voltage on the
7D-01 circuit. If voltage is present at the high speed solenoid, and no current was measured in the step
above, replace the high speed solenoid.
5-47
02 February 2005
Содержание SR-2 SmartReefer2
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