SYSTEMS McGuire VSH Series, Инструкция для владельца и пользователя

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33
4111-0024 — Apr. 2020
© 2020 Systems, LLC
Three-phase units only:
Platform does not rise or
lower. Motor hums, but
does not run.
No voltage is present on
one line.
Note: A motor that is
missing voltage on one line
is said to be single-phased.
Check for blown fuses at branch circuit disconnect.
Replace fuse. Determine cause of blown fuse.
Check motor starter as follows:
1. Disconnect wires at load side of starter.
2. Energize the starter.
3. Measure line-to-line voltage at line side of starter.
4. Measure line-to-line voltage at load side of
starter.
5. Line-side and load-side voltages should be
approximately the same. Replace starter if
voltage values are considerably different from
one another.
Check all wiring to motor for high resistance or no
connection.
Three-phase units only:
Platform does not rise
or lower. Motor runs in
reverse.
Phase reversed.
Reverse any two legs at the branch circuit
disconnect.
Single-phase units only:
Platform does not rise or
lower. Motor energizes,
but does not run.
Line voltage too low.
Check wiring to motor for high resistance. Check for
loose or corroded connections. Check if gauge of
wires to motor are of correct size and specification
for load requirement. Replace if necessary.
Faulty motor centrifugal
switch.
Replace motor.
Faulty motor capacitor. Replace motor.
Symptom Possible Cause Solution
TROUBLESHOOTING