Troubleshooting - HWH 200 Series Operator's Manual

The following is a list of problems, and possible solutions, which might occur to the leveling and room extension systems.
NOTE: Only qualified technicians should install or repair leveling and room extension systems. A knowledge of hydraulics,
welding, and the vehicle's suspension and electrical systems is required. In addition, an understanding of the leveling and room
extension system's hydraulics and electronics is required.
1. JACK RETRACTS AFTER COACH IS LEVEL.
A. Hose or jack has external leak.
B. Fluid is leaking back to reservoir through the control
valve.
2. JACKS WILL NOT RETRACT COMPLETELY.
A. Jack clogged with mud or ice.
B. Main rod bent or scored.
C. Valve plunger is not completely depressed by valve
handle.
D. Spring weak or broken.
E. Hydraulic line pinched.
3. IGNITION SWITCH IS ON, BUT NO POWER TO PUMP
AND/OR LIGHTS.
A. Park brake not set.
B. 12 volts from power source not present.
C. Faulty PC board.
D. Faulty wire or electrical connection.
4. PUMP WILL NOT ACTIVATE.
A. Grounding switch on valve not working.
B. Pump relay not functioning.
C. Pump not grounded.
5. HYDRAULIC PUMP ACTIVATES WITHOUT USE OF
CONTROL VALVE HANDLES.
A. Grounding switch at valve shorted.
B. Pump relay stuck.
C. Relay control wire shorted to ground.
6. HYDRAULIC PUMP ACTIVATES, BUT THE JACKS
WILL NOT EXTEND.
A. Store levers not in operate position.
B. Oil supply is low in reservoir.
C. Pump is not developing pressure.
D. Broken hydraulic line.
TROUBLE SHOOTING
7. LEVELING LIGHTS (YELLOW) ARE NOT FUNCTIONING
PROPERLY.
A.
B.
8. WARNING LIGHTS (RED) ARE NOT FUNCTIONING
PROPERLY.
A.
B.
C.
9. PANEL SHUTS OFF WHEN THE ROOM CONTROL
SWITCH IS PRESSED.
A.
B.
10. PUMP RUNS BUT ROOM DOES NOT MOVE.
A.
B.
11. PUMP DOES NOT COME ON WHEN ROOM CONTROL
SWITCH IS PRESSED.
A.
B.
C.
12. ROOM CREEPS IN AFTER BEING EXTENDED.
A.
B.
13. ROOM CREEPS OUT AFTER CLOSED.
A.
B.
Yellow lights will not go out when vehicle is level: ad-
just sensing unit.
If two or more yellow lights are on replace PC board
or check level sensing unit.
Light will not come on: check for broken wire at warn-
ing switch on the jack.
Lights will not go out: bad warning switch or wires are
shorted to ground.
Check PC board.
Engine battery is low.
Faulty wire or electrical connection.
Faulty wire or electrical connection.
Bad solenoid valve.
The panel is off.
Room control switch is faulty.
Faulty wire or electrical connection.
Retract solenoid valve has an internal leak.
External fluid leak.
Extend solenoid valve has an internal leak.
Front or rear cylinder on room extension has an inter-
nal leak.
MP55.10
02AUG96