Drives Service & Support > Legacy > 1336S > FAQ

1. Using a Digital Speed Pot on a HIM module, you increase the speed on the HIM to the desired speed. After a power down, the next time you power up the drive, the frequency goes to "AT Speed 0.00 Hz". How can I have the drive run at the last speed I had it at before a power down?
2. When I power up the drive the F3 fuse opens on the Gate Driver Board, Why?
3. Upon power-up, the HIM module displays ‘Not Enabled’.
4. I am in two wire control, and the drive does not start from the remote terminal strip.
5. I keep getting an F02 Auxiliary fault, and cannot get rid of it.
6. I am getting an F54 EE Init Value fault and cannot do anything. Fault 53, 32, and 66 also apply.
7. The MOV’s failed. Now what?
8. The drive will not follow an analog input such as 4-20mA, 0-10 volts, or remote pot.
9. I cannot change any of the parameters. The select key does not work.
10. On power-up, the HIM is dark, turns on and off, or just flashes: connecting, id, connecting, etc.
11. What is sensorless vector, and what does it do for me and my drive?
12. What is the difference between current limit and overload current?

1.
Q? Using a Digital Speed Pot on a HIM module, you increase the speed on the HIM to the desired speed. After a power down, the next time you power up the drive, the frequency goes to "AT Speed 0.00 Hz". How can I have the drive run at the last speed I had it at before a power down?
A! When you get the drive to the command speed, you have to press the UP and Down speed control arrows at the same time( these are the two arrows you control speed with). This will save that speed to the EEProm in the HIM. When the drive is powered up and given a start command the drive will ramp to the speed that you set with the up and down speed control arrows. This is actually a function of the HIM module, so any drive that uses a HIM module of the same type will have this ability (all of the 1336 family except the Classic drive).

2.
Q? When I power up the drive the F3 fuse opens on the Gate Driver Board, Why?
A! F3 on the Gate Driver Board is the bus discharge fuse. Check J4 on the precharge board and J10 on Gate Driver Board. If J4 and J10 are on backwards it will cause F3 to open. The J4 should have pin 1 (+ Red wire) and pin 4 (- Black wire) and J10 pin 1 (- Black wire) and pin 4 (+ Red wire). This also applies to the Plus II drive.

3.
Q? Upon power-up, the HIM module displays ‘Not Enabled’.
A! There need to be a true state connection on terminal 30 on the control interface card. If there is no control interface card, a jumper needs to be in place in J4 for the A frame or in J7 for the B-G frame drives. See the user manual for jumper locations. If these conditions are met and the display does not change either the Control Interface Board is faulty or the Main Control Board needs replacement.

4.
Q? I am in two wire control, and the drive does not start from the remote terminal strip.
A! Make sure the appropriate terminals are made. A connection on 20 is necessary for the stop command. A MAINTAINED connection is needed on terminal 19. Both of these terminals must be true for the drive to start. If the drive still does not start, check the direction mask. The factory default reads something like 01111110. Change bit 0 (the one all the way on the right) to a 1. This should allow you to start the drive. Two wire control not only gives a start command, but a forward command also. The same question applies to the Plus II drive also.

5.
Q? I keep getting an F02 Auxiliary fault, and cannot get rid of it.
A! There needs to be a true state connection on terminal 24 on the control interface card. If there is no control interface card, a jumper needs to be in place in J4 for the A frame or in J7 for the B-G frame drives. See the user manual for jumper locations. If these conditions are met and the display does not change either the Control Interface Board is faulty or the Main Control Board needs replacement. The same question applies to the Plus II drive also.

6.
Q? I am getting an F54 EE Init Value fault and cannot do anything. Fault 53, 32, and 66 also apply.
A! Chances are you just upgraded you language module, or this is a new drive. The problem is the parameters saved in the EEPROM on the Gate Driver Board do not fall in the boundaries of the parameters on the Language Module. All that normally needs to be done is to reset defaults and cycle power. You will not get the F 48 Reprogram fault. Remember when power is cycled, let the power completely drain before reapplying ( ~30 seconds). The drive should come up ‘Stopped 0.00 hz’. Reset your defaults one more time. You should now get the F48 Reprogram fault. When this happens, hit the stop button to clear the fault, and the drive is ready. Other causes are a faulty Language Module, EEPROM, or Ribbon Connector between the Main Control Board and the Gate Driver Board.

7.
Q? MOV’s failed. Now what?
A! MOV’s only fail because of voltage. A transient comes into the front end of the drive, the MOV clamps this voltage for as long as it can before failing. The MOV’s that we have in the drive are pretty proven. If the transient is that severe, the customer needs to correct the issue where possible. Otherwise he would need to add an isolation transformer, a 5% impedance Line Reactor, or an additional surge protection device.

8.
Q? The drive will not follow an analog input such as 4-20mA, 0-10 volts, or remote pot.
A! The first thing to check is the source. Is there a good mA, proper potentiometer, or voltage source? Is it within the specified range? Next, check in the diagnostics group. Look at the frequency source. This tells where the drive is looking for its commanded frequency. It should show the source you are sending it. If it does not, change the programming. Usually needs to be changed in the setup group. If the source is correct, look at the next parameter . This shows the frequency the drive will go when a start command is given. Vary your input and see if the parameter follows it. If it does, the drive just needs to be started. If it does not follow, either the signal is out of range, or the main control board may be faulty.

9.
Q? I cannot change any of the parameters. The select key does not work.
A! You are most likely in the display mode. When you first went beyond the main screen, you went in under instead of . Hit the escape key several times to back all the way out, then use the up or down arrow keys until you come to . Hit the enter key. Now you are in the program mode. Sometimes, the drive may not give the option. If this is the case, the drive is password protected, and you need to enter in the password.

10.
Q? On power-up, the HIM is dark, turns on and off, or just flashes: connecting, id, connecting, etc.
A! The HIM power supply is being shorted out or has a poor output. The first thing to do if possible is to get a HIM from another unit and try it. If this works, the HIM is faulty. If this does not work, check the pins in the connector and see if any are backed out of the connector, bent, or broken. If this is a drive with a fan on it, remove the fan connector on the Gate Driver Board. If the him comes up after that, the fan is shorted. Try to remove all the option boards (L6, LAx, etc.). If the drive powers up fine after removing these boards, one of them is faulty. The next thing to try is to find Diode 34 on the Main Control Board. Check for 12 vdc from the anode of the diode to TP7 also on the Main Control Board. If voltage is there, the Main Control Board is probably at fault. If there is no 12 volts, check the switching mode power supply (SMPS) for at least 620 volts dc located at J3 (1 to 4) located on the precharge board. If there is no DC voltage check for open fuses on the precharge board.

11.
Q? What is sensorless vector, and what does it do for me and my drive?
A! Sensorless vector regulates flux producing currents. This will allow for improved motor torque at all speeds, and greatly improve motor torque at low speeds. Other features include a widened speed range, improved speed regulation, and dynamic response. It does not independently control flux and torque producing currents with high bandwidth. Sensorless Vector acknowledges that motor current is the vector sum of the torque and flux producing components. It uses a current resolver to identify flux and torque producing currents in the motor. What can all of this do for you? Motors will benefit by not needing oversizing. Savings from increasing performance for low speed applications, and solid, out of the box performance is provided.

12.
Q? What is the difference between current limit and overload current?
A! Overload is the software current limit while current limit is the hardware current limit. Overload is there to protect the motor and current limit is there to protect the drive. Current limit will limit the amount of current the drive will output. This can also be used to help protect the motor. Overload limits are normally set at motor nameplate values. Current limit is set at the maximum limit you want the drive to output.