11
ORIG, SG: CHECK INLET CONTROL
SYS
LOADING
UNLOADING
AT STARTING AFTER TRANSITION
DID VALVE MOVE PAST
THE OPEN LIMIT SWITCH?
DID VALVE MOVE PAST THE
CLOSED LIMIT SWITCH?
YES SUSPECT BAD OPEN LIMIT SWITCH
SEE PROCEDURE 2.3
NO. DID VALVE MOVE TO
THE OPEN LIMIT SWITCH AND STOP?
YES. SUSPECT BAD CONTROLLER
NO. SUSPECT SLIPPING COUPLING
BAD STEPPER MOTOR. SEE PROCEDURE 2.1
BAD DRIVER CHIP. SEE PROCEDURE 2.2
IF NONE OF THE ABOVE THEN PROBABLY A
BINDING INLET VALVE.
YES. SUSPECT BAD CLOSED LIMIT
SWITCH
NO. DID VALVE MOVE TO THE
CLOSED LIMIT SWITCH AND STOP?
YES. SUSPECT BAD CONTROLLER
NO. IS THE BLOWDOWN AIR
HITTING THE VALVE PLATE
AND KEEPING IT FROM MOVING
CLOSED?
YES. MAKE SURE BLOW DOWN
DEFLECTOR IS IN PLACE. IF NECESSARY,
BEND DEFLECTOR TO DEFLECT AIR
UPWARD
NO. SUSPECT SLIPPING COUPLING.
BAD STEPPER MOTOR. SEE PROCEDURE
2.1
BAD DRIVER CHIP. SEE PROCEDURE 2.2
IF NONE OF THE ABOVE THEN PROBABLY
A BINDING INLET VALVE.
NO. SUSPECT SLIPPING COUPLING.
BAD STEPPER MOTOR. SEE PROCEDURE
2.1
BAD DRIVER CHIP. SEE PROCEDURE 2.2
IF NONE OF THE ABOVE THEN PROBABLY
A BINDING INLET VALVE.
= VALVE COMMANDED TO MOVE TO OPEN OR CLOSED LIMIT SWITCH AND CONTROLLER NEVER
RECEIVES SIGNAL FROM LIMIT SWITCH CONFIRMING THE VALVE MADE IT THERE.
CONFIRM 24 VAC TO BOARD
Summary of Contents for INTELLISYS SSR Series
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