Section 5
MAINTENANCE
33
5.9 TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM PROBABLE CAUSE REMEDY
FLASH CODE: FOUR FLASHES (cont) Plugged air filter Clean and replace if necessary.
Engine problems may have developed Refer to Engine Operator’s Manual.
Starter solenoid relay does not engage Check wiring and tighten all connections.
Replace relay.
Alternator failure Check output of alternator frequency terminal
COMPRESSOR SHUTS DOWN:
NO FLASH CODE: Blown fuse in wiring harness Remove/Inspect fuse and replace if necessary.
Instrument panel connectors loose or Check instrument panel connectors and reattach if
disconnected. required
Instrument panel connectors loose or Check instrument panel wires for broken connec
disconnected. tions or corrosion. Clean and/or replace if required.
Faulty SSAM module Replace the S SAM Module
FLASH CODE: ONE FLASH Faulty compressor temperature switch Check wiring connection to switch and tighten as
required.
Check switch continuity when cool and replace if
necessary .
Cooling air flow is insufficient Clean cooler and check for proper ventilation.
Low compressor fluid sump level Add fluid as required.
Clogged compressor fluid filter Change filter element.
Faulty thermostat Change the thermostat element.
Loose or broken fan belt Check fan belt and tighten/replace as necessary.
Plugged fluid cooler tube (internal) Replace cooler.
FLASH CODE: TWO FLASHES F aulty Engine coolant temperature switch Check wiring connection to switch and tighten as
necessary .
Check switch continuity to ground when cool and
replace if necessary.
Cooling air flow is insufficient Clean cooler and check for proper ventilation.
Loose or broken fan belt Check fan belt and tighten/replace as necessary.
Engine problems may have developed. Refer to engine operators manual.
No engine coolant Check engine coolant level and fill with proper wa
ter/glycol mixture as required.
FLASH CODE: THREE FLASHES Faulty engine oil pressure switch Check wiring connection to switch and tighten as
required.
Install gauge in parallel with switch. Replace switch
if pressure exceeds 15 psig and switch stays
open. If pressure is less than 15 psig, refer to En
gine Operator’s Manual.
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