Troubleshooting The Lift System - Precor Energy Series Service Manual

02 RAM error
03 EEPROM error
09 EPROM Downstairs
11 Upstairs watchdog
12 Downstairs watchdog
13 Fan
14 Board Fan
15 AC input voltage too high
16 AC input voltage too low
17 Overheating
18 DB Resistor open
19 Low input voltage for PFC
20 Tread error: motor will not drive
21 Not enough speed
22 No speed pulse at startup
23 No speed pulses after start up
24 Not slowing down
26 Erratic speed pulses
27 Tread error: too much output (to motor) current
28 Tread error: motor controller limit
29 Tread error: too much input (from AC outlet) current
30 Communications error: downstairs to upstairs
31 Incorrect communication Downstairs to Upstairs
32 Communications error: upstairs to downstairs
33 Incorrect communications Upstairs to Downstairs

Troubleshooting the Lift System

Lift System Description:
The lift system on these units consists of an AC line voltage driven lift motor (120 Vac), and an
internal 1 K potentiometer for lift position identification. The lift motor contains two motor
windings, one to operate the motor in an "upward" direction and the other to operate the motor
in a "downward" direction. As the lift motor is operated, the motor also rotates the potentiometer
via an internal gear system. Therefore, the position of the lift system can be determined by
monitoring the value of the internal potentiometer. The lift motor is initially set at a known
starting position (calibration, See Procedure 4.1), subsequent motor movement is tracked via
the potentiometer resistance reading.
Note:
All resistance measurements must be performed with power removed from the treadmill.
Performing resistance measurements with voltage applied may damage your ohmmeter.
Procedure
1. If the lift motor operates but creates a lift error (error 40 or 42) go to step 11. If the lift motor will
not move continue with step 2.
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Fatal Error Codes
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