Top 20 Precor 9.1 Mode 1 Treadmill Repair Parts Eprom Questions & Answers

Precor Error 10, Line Frequency out of Acceptable Range Probable Cause 1. Treadmill is connected to a non-dedicated AC circuit
2. The AC hot and AC neutral wires are reversed on a 120VAC circuit.
3. The upper PCA has an incorrect jumper setting.
4. Fuse feeding the stepdown transformer is bad.
5. AC line frequency is incorrect.
6. AC line may be excessively noisy. Corrective Action
  1. Treadmill must be connected to a completely dedicated 20amp AC circuit. Both hot and neutral leads must be dedicated to the treadmill. If the circuit is shared with another piece of equipment, it can cause enough electrical noise to make the AC line frequency impossible to identify. The AC circuit for the treadmill must be re-configured as a completely dedicated 20amp circuit.
  2. Many line frequency detection systems observe the AC line frequency on the hot AC line. In the event of a reversed 120VAC circuit, the observation is taking place on the neutral (ground) part of the AC line. Many observing systems are not capable of detecting line frequency on the neutral line. First it must be determined if the reversal is in the AC wiring feeding the treadmill or in the internal wiring of the treadmill. The hot and neutral lines can be confirmed by measuring each in reference to AC (green wire) ground. The hot wire will read full line voltage (commonly 105 - 120VAC) and the neutral should read about 0VAC.
  3. The upper PCA's for some units had a jumper setting for use with SCR or PWM drive circuits. If the jumper was set on the upper PCA as PWM on an SCR unit, the Error 10 appears. Change the jumper setting to SCR to correct the problem.
  4. A pair of fuses were used on some treadmills (C944 PWM version 2 and C96x PWM version 2) that fed the stepdown transformer for the low voltage power supply on the lower PCA. The AC line frequency was observed on the output of one of the fuses. If the fuse blew, AC line frequency could not be detected even though the treadmill appeared normal under other circumstances.
  5. It is unlikely, however, the AC line frequency could be out of acceptable limits. This would more likely occor in countries were AC power systems may not be well developed and controlled. There is little that can be done to correct this issue. If the source frequency cannot be corrected, the only possibility would be replacing the treadmill with one that utilizes a PWM motor controller. PWM motor controllers do not depend on line frequency for speed control.
  6. At times the AC being fed into the distribution system is too electrically noisy to allow correct line frequency identification. This can be caused by other equipment within the AC distribution system creating the electrical noise. It can be difficult to identify the source of the electrical noise. There is little that can be done to correct this issue. The source needs to be located and removed or made electrically quiet. If this cannot be done, the only possibility would be replacing the treadmill with one that utilizes a PWM motor controller. PWM motor controllers do not depend on line frequency for speed control.

Precor Error Code 10 10 Line Frequency out of Acceptable Range

Precor 9.1 Mode... | 216 views | 0 helpful votes

Precor Error E4, Incomplete Initialization Probable Cause Indicates that an incomplete upper PCA to lower PCA initialization occurred. When this error occurs, all lift motor and drive motor motion is ceased and the display will go blank except for the error displayed.
Corrective Action Run the initialization program. Caution: The treadmill's running belt will accelerate to the treadmill's maximum speed (12mph). DO NOT stand on the treadmill's running belt during the procedure.
  1. Set the on/off switch to the OFF position. Wait a minimum of 10 seconds to allow the internal power supply to discharge.
  2. Remove the safety key from the console and set the on/off switch to the ON position.
  3. Press INCLINE UP and SPEED DOWN keys together. While pressing these keys, replace the safety switch on the console. Continue holding the INCLINE UP and SPEED DOWN keys until the display goes blank. INIT will appear in the time window of the display. The EEPROM is now clear and reset. After a second, 1.25 will appear in the distance/calories window, 15.0 (the maximum incline) will appear in the incline window, and 12.0 (the maximum speed) will flash in the speed/pace window.
  4. Press QUICKSTART to begin the speed calibration process. Power bits will appear in the incline window, the target speed will appear in the time window and the actual speed will appear in the speed/pace window. At the beginning of the process, the target speed will be .5mph. The running belt will start. Once the actual speed reaches .5mph, the target speed will then change to 12mph and the running belt will accelerate until it reaches 12mph, then it will stop.
  5. When the running belt stops, the display will return to the user mode and the initialization process is complete.
Precor Error Code E4

Precor 9.1 Mode... | 231 views | 0 helpful votes

Step 1:

1) test the fuse see the block diagram
2) replace the old batteries by new ones with the same type
3) tight the RIbonn cable FOR keypads, clean it.
4) Adjust the REED SWITCH, clean it, test for open or faulty, tight very WELL the connector, see the diagrama attached.
God bless you

Step 2:


Step 3:


Precor 9.1 Mode... | 160 views | 1 helpful votes

go www. or www. or www.

God bless your

Precor 9.1 Mode... | 373 views | 1 helpful votes

To clear the error log, press "QUICKSTART" for a minimum of four seconds while viewing the list. Prompts will appear on the display and let you know when the log has been deleted.

Precor Exercise... | 50 views | 0 helpful votes

Precor Exercise... | 73 views | 0 helpful votes


Precor Exercise... | 104 views | 0 helpful votes

It might be the battery. A fully charged battery is required to move the ramp up and down. The battery is like a car battery, if you don't use it then it dies and might need to be replaced.

Precor Exercise... | 138 views | 0 helpful votes®-546i-elliptical-fitness-crosstrainer™

use of:

Precor Exercise... | 119 views | 0 helpful votes

Contact Precor directly to inquire.

Precor Exercise... | 173 views | 0 helpful votes

Are you sure the PSU is functioning? Check it with a multimeter set for DC Voltage. Compare what it is putting out to what the factory specs are.

Precor Exercise... | 174 views | 1 helpful votes

If it can be recharged it needs to be but only on a trickle charge over a lone time even a week at very low amps like 1 or 2 no more than 6 amps good luck

Precor Exercise... | 111 views | 0 helpful votes

Not finding what you are looking for?
Precor 9.1 Mode 1 Treadmill Repair Parts Eprom Logo

11 questions posted

Ask a Question

Usually answered in minutes!

Top Precor Exercise & Fitness Experts


Level 3 Expert

8546 Answers


Level 1 Expert

31 Answers

Andrew Taylor
Andrew Taylor

Level 3 Expert

33322 Answers

Are you a Precor Exercise and Fitnes Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Precor Exercise & Fitness

  • Precor Exercise & Fitness

Most Popular Question

procor 9 1 treadmill turn switch top

  • Exercise & Fitness