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CHAPTER 2 MAINTENANCE
NMC-WOLLARD
2021 Truax Blvd. Eau Claire, WI 54703 ● P: 715-835-3151● F: 715-835-6625 ● www.nmc-wollard.com
TML-704H Maintenance Lift Manual No. 310547
2 TROUBLE SHOOTING
SEPTEMBER 01, 2015
2.10 PROBABLE CAUSES/REMEDIES BY CODE: ELECTRICAL
Code
Number
Probable Cause
Test/Remedy
E1
Fuse blown
Check for short circuit. Replace with fuse of
correct type and rating.
E2
Wiring disconnected or
open circuit
Check continuity from point to point. Check for
damaged or disconnected terminals.
E3
Bad ground connection Check and reconnect ground.
E4
Connector damaged
Check for damaged, burned or open circuit pins or
sockets.
E5
Switch contact not
closing
Test switch. Replace or repair as required.
E6
Switch contacts
shorted
Test switch. Check for water infiltration. Replace
or repair as required.
E7
Relay/solenoid coil
open circuit
Check coil. Replace if required.
E8
Relay/solenoid coil
short circuit
Test coil. Replace if required.
E9
Relay contacts not
closing
Test. Repair or replace as required.
E10
Relay contacts welded
shut
Test. Repair or replace as required.
E11
Limit switch not being
actuated properly
Check operation of mechanical linkage. Test for
contact closing or opening. Adjust or repair as
required.
E12
Bulb defective
Check. Replace.
E13
Socket contacts dirty or
corroded
Clean or replace as required.
E14
Capacitor short circuit
Check with meter on resistance range. If capacitor
shows a continuous low resistance, replace.
NOTE: Positive (+) lead on meter must be
connected to positive (+) terminal on capacitor.
E15
Capacitor open circuit
Check with meter on resistance range. If meter
does not show any initial deflection when
connected for the first time, replace capacitor.
E16
Diode open circuit
Check with meter on resistance range. Switch
meter leads to check polarities. If meter does NOT
deflect approximately ½ scale for one polarity only,
replace diode.
E17
Diode short circuit
Check as in #16 above. If meter reads low
resistance for both polarities, replace.
E18
Resistor defective
Check resistance with meter after first zeroing
meter. If resistance is not /- 15% of rated
value, replace resis tor. Test, replace if required.
E19
Meter defective
Test, replace if required.
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