24
22
4.Check the motion of the door. Turn the air pressure to zero and push the controls up and down a few times to expel any air left in the system. Manually raise the door. Go slowly and do no not force the door up -- air is being expelled form the bottom cylinder. If the door moves normally, go to step 5.
5.Loosen the turnbuckle that holds the chain/belt loop together. Remove the chain/belt from the sprocket on the door shaft. Remember the position of the piston rods so readjustment will not be needed when the chain/belt is put back on.
Manually move the door open and down. If it moves easily the problem is within the cylinders of the operator. If not, turn off the air cylinder--the door needs repair. Call UPI at 1(800)542-7221.
If the door is moving easily, pull each piston out of the cylinders as far as possible and compare their lengths. They should be equal. Push the pistons as far into the cylinder as possible. Again, the lengths should be equal. The piston rods will not move easily as air is entering or exiting the valve at the bottom of the cylinder.
If the piston lengths are not equal or if they will not move, then the problem is either in the cylinder or the pistons. Call UPI at 1(800)542-7221 to order a rebuild kit or to arrange to send the operator back for rebuilding.
C.
Fixing Control Problems
Caution: Do not operate, adjust, or perform installation or maintenance on any part of the system without first disabling all electrical power to the system. Use extreme care to prevent electrical shock when working in a wet environment.
1.If there was no air-exhaust noise when an attempt was made to open the door make certain the filter/ regulator gauge on the control box is between 60 and 90PSI. Do not use the gauge on the air com- pressor -- the air line may be blocked between the compressor and operator making the gauge inaccu- rate.
2.Determine if the problem is the signal-sending device or the control box. First check the control boxes:
Standard Control Box--Disconnect all wires from the terminals (some setups have a switch to do this within the system). Jump a wire between the common and open terminals: the door should open. Jump a wire between common and close: the door should close. If this happens, then the problem is in the signal-sending device. If nothing happens, call UPI at 1(800)542-7221.
Deluxe Control Box--Jump a wire between terminals 13 and 15: the door should open. Jump a wire between 14 and 15: the door should close. If the door does not move there is probably a conflicting signal from one of the other devices. Try discon- necting a single set of wires (from one signal device) at a time. Try the control box each time you disconnect a set of wires. When the door works, the disconnected device is the problem. If jumping the wires in the control box does not move the door when all of the devices have been disconnected call UPI at 1(800)542-7221 to order a new control box.