Neary 181, Service Manual

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- ORIGINAL INSTRUCTIONS -
ELECTRICAL TROUBLESHOOTING
- ORIGINAL INSTRUCTIONS -
PROBLEM--AC Main Power Controls: no electrical power to control panel.
Verify all wires shown on the wiring diagram are correct and pull on wire terminals with approximately 3
lbs force to verify there are no loose terminal connections and/or no loose crimps between the wire and the
terminal. If problem persists, test as listed below.
Possible Cause Checkout Procedure
Emergency Stop Botton(ESS)
is Depressed.
You must push the System
Start Switch (SSS) to get
power to control Panel.
Main Power Cord is not
plugged in.
ALL switches MUST be
turned
OFF
for contactor
to pull in.
Main 15 amp outlet circuit
breaker has tripped.
No 120 Volts AC power to
Filter (FTR).
No 120 Volts AC power out
of Filter.
No 120 Volts AC power to
Main Circuit Breaker (MCB).
No 120 Volts AC power from
Main Circuit Breaker (MCB).
A.
Pull Up on ESS Button
B. Push the SSS. Listen for the
Magnetic Starter (MAG) contacts
to pull in with a clunk
C. Plug in main power cord
D. Turn all switces off.
E. Check circuit breaker in your
building and reset if necessary.
(Check wall outlet with a light to
make sure it works)
F. Check for 120VAC at Cord into
FTR (Power Cord Wire No. 32)
G. Check for 120VAC out of FTR
H.
Check for 120VAC to MCB
I. Verify that MCB is "ON" or flip
switch to "ON" position. Then
check for 120VAC out of MCB.
Machine works
Yes--end troubleshooting
No--go to Step B. next
Machine works
Yes--end troubleshooting
No--go to step C. next.
Machine works
Yes--end troubleshooting
No--go to step
D.
next.
Machine works
Yes--end troubleshooting
No--go to step E. next.
Machine works
Yes--end troubleshooting
No--go to step F. next.
You have 120VAC at Filter input.
Yes--go to Step G. next.
No----but light works in outlet--
Replace Power Cord
You have 120VAC at Filter output.
Yes-- go to step H. next.
No--Replace the Filter.
You have 120VAC at MCB input.
MCB left side Terminal to Terminal
Block 4 (Blue) for 120 Volts AC
Yes--Go to Step I . next.
No--Verify continuity of wires from
Filter to MCB and replace if bad.
You have 120VAC at MCB output.
MCB right side Terminal to Terminal
Block 4 (Blue) for 120 Volts AC
Yes--If machine works, end of
troubleshooting, if not, go to Step J.
next.
No--Replace MCB.