Saftronics SH6 Series - Page 23

SH6- HEATER CONTROLLER SERIES
TROUBLE SHOOTING
CONDITIONS AND
SYMPTOMS
POSSIBLE REASON
PROPOSED CHECKS
PROBLEM ELIMINATION
- POWER ON
- POWER ON LED ON
PC550 NOT LIT
THERE IS NO AC POWER ON
TERMINALS R, S & T
MEASURE INCOMING VOLTAGES
CHECK EXTERNAL WIRING AND
FUSES
BLOWN F1, F2 OR F3 OR BLOWN
F4, F5 OR F6
ISOLATE DRIVE, CHECK THE
FUSES
REPLACE THE FUSES
FAULTY PC550 CARD
REPLACE THE CONTROL CARD
- POWER ON
- PHASE ROT LED ON
PC550 NOT LIT
INCORRECT PHASE ROTATION OF
R, S & T ON TERMINALS R, S & T
CHECK PHASE ROTATION
SWOP ANY TWO INCOMING R, S, T
PHASES
- START IS PRESSED RUN
LED NOT LIT
FAULTY PUSHBUTTON
CHECK P/B
REPLACE P/B
STACK O/TEMP OR EXT.
INTERLOCKS IN STOP CCT ARE
OPEN CCT
CHECK INTERLOCKS
WAIT FOR STACK TO COOL OR
RESET EXT INTERLOCKS
FAULTY PC550
CHECK FOR 24VDC BETWEEN
TERMINALS 14 AND 7 ON PC550
REPLACE PC550
CHECK VALUE OF BURDEN DIP
SWITCH SELECTION WITH TABLE
4.1
USE CORRECT DIP SWITCH WITH
CORRECTLY RATED VALUE
- DRIVE STOPS DURING ACCEL
OVERLOAD RELAY HAS TRIPPED
CHECK SETTING AND RATING OF
O/LOAD
RESET O/LOAD OR REPLACE WITH
CORRECT RATING.
MAIN FUSES HAVE TRIPPED
CHECK FUSE RATING AND
CONTINUITY
TURN MAX CURR POT CW TO
DESIRED CURR LIMIT
EXTERNAL START COMMAND
MISSING
CHECK START SIGNAL
RECTIFT START SIGNAL CCT
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