Landice L Series, Diagnostic And Service Manual

Page: 92 / 127

92
VOLTAGE TESTS
Variance in voltage affects treadmill performance
1. Confirm incoming line voltage: 120/220VAC –
PWM Units: Measuring between
Hot and Neutral
on relay board.
Measuring between
L1
and
L2
wires on PWM board.
SCR Units: Measuring between
Hot and Neutral
on SCR board.
For 115V and 230V rated PWM’s acceptable variance is + or - 8%. For SCR’s acceptable variance
is + or - 10%.
2. Confirm 12-17 VDC (plug into outlet) output voltage from DC (Transformer) pack.
3. Confirm 10 VDC (for 110V) and 20 VDC (for 220V) out of Motor Control Board per mile per
hour. See example
Example:
SCR: Measure between MTR+ and MTR-
PWM: Measure between A+ and A-
In both of these examples we have should have a voltage reading of 30VDC for 110V and 60VDC
for 220V @3mph.
4. Confirm 12-17 VDC between Black and Green wires on main wire harness. This is power being
delivered to the upper display board.
5. Confirm incoming voltage: 6-7 VDC between V+ and P1, 0-7VDC between P1and P2 (will vary
in relation to speed indicated)