Troubleshooting; Troubleshooting Table - Up Operation - Vertical Express I-2 Manual

Troubleshooting

Troubleshooting
Verify the following list before using the troubleshooting tables. See also: Troubleshooting Flowcharts on page 23.
• No binding is present in the hoistway.
• The proper voltage is supplied to the power unit.
• All valve adjustments have been completed as recommended.
• All vee belts on the power unit have the proper tension.
• There is no oil on the belts to cause slippage.

Troubleshooting Table - Up Operation

Problem
The pump runs, but the car will not run at high speed.
The car will not slow down to leveling speed.
The car will not make a hydraulic stop.
Acceleration, deceleration, leveling speed, or stop
are erratic.
The leveling speed slows down, or the car stalls after
slowdown (check if releveling speed slows down).
20
Solution
1. Check that the line shut-off valve is fully open.
2. Check for the correct motor rotation.
3. Check for the correct relief pressure setting.
4. Check that the up fast solenoid pulls IN.*
5. Turn OUT on the up start adjustment.
6. Turn IN on the up stop adjustment.
7. Make sure that the regulator piston is free.
8. Make sure that the up pilot piston is free.
1. Check that the up slow solenoid pulls IN.*
2. Check that the up fast solenoid drops OUT.*
3. Turn OUT on the up slowdown adjustment.
4. Check the up leveling speed. Set for 10 to 12 FPM.
5. Make sure that the regulator piston is free.
6. Make sure that the pressure control piston is free.
1. Check that the up slow solenoid drops OUT.*
2. Check for the correct low pressure adjustment.
3. Turn OUT the up stop adjustment.
4. Make sure that the regulator piston is free.
5. Make sure that the up pilot piston is free.
1. Make sure that the check valve piston is free.
2. Make sure the spring on the regulator piston does not bind.
1. Turn IN on the slowdown adjustment.
2. Replace the leveling adjuster/strainer.
* Check the solenoids for voltage and for damage to the sole-
noid tube. Check the plunger for binding. Do not reseat.
If the seat in the pilot body is damaged, replace the pilot.
I-2 / I-3 Valve
©Vertical Express