|
| |
TM 10-4320-343-14
Table 4-2.1. Unit Troubleshooting Table (Model 350 PAFN). (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 9
With engine running in AUTO, check voltage at green wire on Mode Switch in pressure controller
(Figure 4-53). Check for 3-4 Vdc.
a. Replace control box (paragraph 4-14.4) if incorrect voltage is indicated.
b. Replace pressure controller (paragraph 4.14.2) if incorrect value is indicated.
4. ENGINE RUNS ERRATIC IN AUTOMATIC MODE.
WARNING
Do not smoke or use spark or flame producing equipment while troubleshooting.
Move equipment off line and have a fire extinguisher at hand when troubleshooting
involves electrical circuits.
Failure to heed these warnings may result in death or serious injury of personnel.
NOTE
Adjustment in step 1 below can only be made if pump is connected to a positive
source of pressure greater then 10 psi.
Step 1
Remove cover (item 3, Figure 4-55) from actuator controller.
Check settings on potentiometers in actuator and make adjustments (paragraph 4.14.4) as necessary.
Step 2
Check availability of air and fuel in accordance with paragraphs 3 through 8 of Malfunction 2
Step 3
Check adjustment of valves in engine. (paragraph 4.10.23).
Adjust valves (paragraph 4.10.23) if incorrect voltages are indicated.
Step 4
Test magnetic pickup (Step 12, Malfunction 2).
Replace pickup (paragraph 4.14.3) as required.
Step 5
Test branched cable assembly (item 15, Figure 4-52) for continuity and shorts.
Replace branched cable assembly (paragraph 4.14.1) if defective.
Step 6
Remove cover (item 6, figure 4-53) and check continuity from pin E of right hand cable connector on
pressure controller to MODE switch wiper (green wire) inside of pressure controller.
Replace pressure controller (paragraph 4.14.2) if continuity is not indicated.
Step 7
Test fuel control actuator (Step 11, Malfunction 2).
Replace actuator (paragraph 4.14.4). if continuity is not indicated and/or actuator does not respond.
4-10.6 Change 1
|
