Neary 555 SRI, Service Manual

Page: 24 / 74

24
- ORIGINAL INSTRUCTIONS -
ELECTRICAL TROUBLESHOOTING
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
Guard doors must be
closed and ALL switches
MUST be turned OFF for
contactor to pull in.
Main 20 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)
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--but light works in outlet--go to Step
F.
next.
No--and light does not work in outlet. You
must solve your power delivery
problem independent of machine.
FTR "Line" Terminals for 120 Volts AC
Yes--Go to Step G . next.
No--Replace Power Cord- 6059054
FTR "Load" Terminals for 120 Volts AC
Yes--Go to Step
H
. next.
No--Replace Filter
Measure 120 VAC from MCB Terminal
(01MCB--) to Terminal Block 4
(02TBW-4) blue (use square hole)
Yes--Go to Step I . next.
No--Check wires & replace if needed.
Measure 120 VAC from MCB Terminal
(03MCB--) to Terminal Block 4 blue
(02TBW-4)
Yes--Go to Step J . next.
No--Flip Switch on MCB to "ON" - Ma -
chine works-- end trouble shooting
Machine does not work-- replace MCB
A.
Pull Up on ESS Button
B. Listen for the Magnetic Starter
(MAG) contacts to pull in with a clunk
C. Plug in main power cord
D. Close guard doors and turn off all
switches.
E. Check circuit breaker in your build -
ing and reset if necessary. (Check
wall outlet with a light to
make sure it works)
F.
Check for 120V at cord into FTR
(Power Cord #32)
[Blue wire to Brown wire]
G. Check for 120V out of FTR
[Blue wire to Brown wire]
H. Check for 120V to MCB
I. Check for 120V to MCB