January 2019 Page 16
TROUBLESHOOTING
Mechanical portions of Sky Climber Hoists and Sky Lock must not be repaired in the field.
Perform only those repairs for which you are qualified and trained. If a problem condition still
exists, contact your Sky Climber representative.
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION HOIST
Hoist won't come down Sky Lock Brake tripped Over speed Condition: Get off platform!
Nuisance Tripping: Run system up 1"
Rese
Electric Motor runs slow
or hums and will not lift
Low source voltage Use booster transformer or separate drop
cords
On long drops, too much voltage is
lost in electric cord.
Use booster transformer or separate electric
cord to each unit
Badly "pitted" points Return to Factory Authorized Service Center
Brake not releasing
Defective contactor
Capacitor
Motor Overheats Incorrect Voltage Motors overheat at less than 200V or greater
than 240V for 220V motors and less than
190V and
reater than 220V for 208V motors
"Popping" Circuit
Breaker
Breaker undersized Connect to proper size breaker
Short in electric cord Replace cord
Runs in only one
direction
Defective contactor center Return to Factory Authorized Service Center
Motor does nothing No Power Restore
Thermal protector tripped After one hour cooling period, restart
(motor is usually hot)
Emergency Stop Switch engaged Disengage
Hoist drifts when
stopping is in DOWN
direction
Primary brake worn Return to Factory Authorized Service Center
SKY LOCK
Engages due to over-
speed conditions
Remove personnel from platform.
Lower platform to ground or raise to
roof by means other than the hoist.
Contact Sky Climber representative.
DO NOT release or reset brake.
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