Laplante V120103-RS11, Operation Manual

Page: 55 / 64

Operation manual
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8.0: TROUBLESHOOTING TABLE
There are a lot of reasons result fault.
Information collection is important for operator to find out the causations.
Do analysis carefully before repair or change parts.
Please inspect the machine following this way.
A. Check cable connection,
B. Inspect piping connection,
C. Pay attention to burning smell of electrical parts.
MALFUNCTION POSSIBLE CAUSE REMEDY
Motor will not
run
1. Blown branch circuit fuses.
2. Blown line disconnected fuse or
tripped circuit breaker.
3. Blown control circuit fuse(s).
4. Magnetic starter overhaul relay
tripped.
5. Loose or broken wires. (Motor
or control)
6. Defective or damaged control
circuit components. (Relays,
temperature switches, etc.)
7. Damaged motor
1. Renew fuse(s).
2. Renew fuse(s) or reset circuit
breaker.
3. Renew control circuit fuse(s).
4. Reset overload relay(s).
5. Check and repair or replace
broken wire(s) and
connection(s).
6. Check components. Renew
as required.
7. Repair or replace motor.
Air end will not
rotate 1. Defective or damaged air end
1. Replace air end
Motor will not
rotate 1. Defective or damaged motor
1. Replace or repair motor
Air end/motor
will not come up
to full speed
before starter
overload trips.
1. Low line voltage or inadequate
power supply
2. Starting against pressure. Unit
receiver not blown down
1. Have qualified electrician
check and correct power
supply.
2. Check and correct cause of
unit receiver not blowing
down. (Blow down valve;
controls)
Compressor
fails to pump
(load) or is slow
to load after
running
unloaded
1. Control bleed orifice plugged.
2. Sticky intake valve operating
parts.
1. Clean control bleed orifice.
2. Disassemble, clean or
replace faulty intake valve
parts as required.
Compressor
stops but air
receiver/oil
reservoir does
not blow down
1. Faulty blow down valve.
1. Renew blow down valve.