SECTION 6: TROUBLESHOOTING
VIPER DIESEL
PAGE - 24
090058-OP_r0 (AUGUST-2014)
VANAIR MANUFACTURING, INC.
(800) 526-8817 • www.vanair.com
6.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Possible Cause
Corrective Action
Machine does not start
Fault:
Freq Sensor Error, Machine Will
Not Run
Controller is not receiving input from
alternator connector
Check connection/continuity.
During extremely cold weather, use of
heater pads is required to get engine to spin
fast enough to generate a usable signal. If
no heater pads are installed, change crank
sequence to Manual Crank (refer to
Section
4.6.3.1, Parameters
).
ENGINE
Engine will not crank
Faulty battery connection.
Check for proper battery connections and
battery charge.
Battery out of power
Recharge or replace battery.
Control module fuse blown
Check fuse; refer to
Section 7.9
.
Machine hood shutdown safety switch
prevents start-up of engine
Close hood panel or check if roof switch is
faulty.
Faulty starter or starter solenoid
Replace.
Faulty 50A circuit breaker
Replace.
Engine will not start
Low fuel and/or oil supply
Check fuel gauge. Replenish as necessary.
Consult the Engine Operator’s Manual for
additional information on engine
maintenance.
Pinched fuel line
Replace or reroute if necessary.
Plugged fuel filter(s)
Replace if necessary. Refer to the Engine
Operator’s Manual for additional information
on engine maintenance.
Low battery voltage
Recharge or replace if necessary.
Loose connections; tighten connections.
Dirty connections; clean connections.
Plugged engine air filter
Replace engine air filter. Refer to Engine
Operator’s Manual.
Defective oil pressure switch
Check continuity, and replace if necessary.
Defective engine temperature switch
Check continuity, and replace if necessary.
Poor ground connection
Check and clean/renew connection.
Improper Control Operation:
Engine does not speed up
Speed control actuator stuck
Lubricate; replace speed control actuator if
necessary.
Engine speed control lever stuck
Free lever and lubricate if necessary.
Continued on next page
