Error indicates that the incline (lift) system on either a treadmill or EFX has been instructed to start moving and no lift motion has been detected by the lift position monitoring system.
1. The lower PCA lift fuse blown.
2. The lift motor is physically jammed and unable to move.
3. The lower PCA is bad.
4. The lift capacitor is bad.
5. A lift motor winding is bad.
6. The upper PCA to lower PCA interconnect cable is bad.
7. The upper PCA is bad.
1. Remove power from the unit and remove the lift fuse from the lower PCA. Measure the fuse
with an ohmmeter, the fuse should read approximately 1 ohm or less. If the ohmmeter
reading is significantly high, replace the fuse. If the fuse is open, please refer to #3 and #4
below before you continue.
2. Disconnect the lift motor from the lift platform (treadmill) or ramp (EFX). If the lift tube or lift
nut is jammed against the motor housing, rotate the lift nut or lift tube away from the motor
housing. If the lift was jammed, please refer to #3 below before you continue. Calibrate the lift
motor per the appropriate service manual procedure and reattach the lift motor to the lift
platform or ramp.
3. The lower PCA can fail in one of two modes. The lift switch could fail in an operated
condition. If this happens the lift will move (either up or down) as soon as the unit is powered
up. The typical result is that the lift will be physically jammed as described above, it will also
probably cause the lift fuse to blow.. The lift switch may also fail in an open condition. If this
happens the lift will not operate in one direction. If either of these conditions occur the lower
PCA must be replaced.
4. Some units use external lift capacitors, most have the lift capacitor mounted inside the lift
motor. This section for for use on units with external lift capacitors. If the lift capacitor is
shorted, the lift fuse will blow. The capacitor may be checked for a short by disconnecting it
from the lift motor and measuring it with an ohmmeter. A good capacitor will read in the
millions of ohms. If the reading is significantly low, replace the capacitor. Capacitors also fail
in the open condition. If a lift capacitor is open the lift motor will try to run but will not have
normal power. The capacitor may checked by measuring the A.C voltage across the
capacitor. A good capacitor will read A.C. peak voltage an open capacitor will read A.C RMS
5. If a lift motor winding is bad the lift will not operate in one or both directions depending on the
exact fault in the motor. The lift motor winding may be checked with an ohmmeter. A.C lift
motors will have a split winding (3 wires) D.C lift motors will have a single winding. On A.C
motors both windings must be checked. Depending on the lift motor being tested, normal
winding readings could vary anywhere between 1 and 60 ohms. Refer to the appropriate
service manual for the motor being tested.
6. Substitute a known good interconnect cable to determine if the existing interconnect cable is
bad.7. Substitute a known good upper PCA to determine if the existing upper PCA is bad.