HWH 200 series, Руководство оператора

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