CUMMINS Onan HDZAA Specifikace stáhnout pdf (Strana 29)

4-2

inverter will shut down the generator set.

See PMA information in section 4−9 for engine

speed calculation.

3. Faulty inverter.

CAUTION

Always perform stator check before

replacing the invertor. Failure to do so will result

in damage to the inverter.

Diagnosis/Repair:

1. Contact an authorized Cummins Onan dealer.

CAUTION

Always perform stator check before

replacing the invertor. Failure to do so will result

in damage to the inverter.

OVER TEMPERATURE (INVERTER)

Possible Cause Inverter temperature detected to

be over 70° C.

Diagnosis/Repair:

1. Reduce loads.

CAUTION

Always perform stator check before

replacing the invertor. Failure to do so will result

in damage to the inverter.

OVERLOAD

Possible Cause Too many applications are con-

nected, or the inverter is defective.

Diagnosis/Repair:

1. Measure current draw. If it is greater than 32

amps, reduce the number of appliances con-

nected in the coach and wait a few minutes for

generator set to cool down. Press STOP to stop

engine and restart the generator set.

2. If the generator set shuts down on ’Overload’

condition, disconnect it from the coach and

bench-test with a load-bank. If the generator

set runs fine without shutting down, then the

problem likely exists within vehicle wiring and/

or appliances. In the event that it shuts down

with no load connected, perform checks in Step

3. Ensure stator is not damaged and has no

shorts internally or to Ground on all Main and

Auxiliary Windings. Test winding insulation re-

sistance with a Megger. Replace state if neces-

sary. If the stator is good, replace the inverter.

CAUTION

Always perform stator check before

replacing the invertor. Failure to do so will result

in damage to the inverter.

LOW ENGINE POWER

Possible Cause Engine speed is below 2300 rpm

Diagnosis/Repair:

1. Contact an authorized Cummins Onan dealer.

SYMPTOM DIAGNOSTICS

DEAD OPERATOR PANEL

Possible Cause/Diagnosis/Repair

1. Contact an authorized Cummins Onan dealer.

A. Replace the 30 amp fuse on the internal

control panel, if blown.

B. Check for 12 VDC at Pin 3 of the 10-pin

connector on the internal control panel and

for a good ground at Pin 10.

C. Check for 12 VDC at Pins 2, 3 and 6 of the

9-pin connector on the internal control

panel and for a good ground at Pin 5 of the

6-pin connector.

D. Repair wiring and connectors as neces-

sary.

ENGINE CRANKS BUT DOES NOT START

Note: The generator will make up to three start at-

tempts, cranking each time for 5 seconds and paus-

ing for 2 seconds if necessary before the next crank.

Gen Wait should appear on the display.

Possible Cause/Diagnosis/Repair

1. Clear the Gen Wait message from the Operator

Panel by cycling it off and on. Try starting again.

2. Check the fuel level and fill as necessary.

3. Press the stop switch (p. 2-2) if it is not in its “1”

position.

4. Replace the fuel if it is not of the specified grade

or suitable for the ambient temperature (p 2-1).

ENGINE SPITS/SPUTTERS/EXHAUSTS WHITE

SMOKE

Possible Cause/Diagnosis/Repair

1. Air in fuel system: Prime fuel system by turning

on the display, lift pump should run for 5 min-

utes to prime system. If problem goes away

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