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Instruction Manual
IM-106-340AC-1, Rev. 1.0
April 2005
5-5
SPS 4001B
Figure 5-1. SPS 4001B Troubleshooting Flowchart (Sheet 2 of 2)
CIRCUIT BOARD IS
FAULTY. REPLACE
CIRCUIT BOARD.
+5 VDC
AND +24 VDC
?±10%
+5 VDC IS ON TP2; TP3 IS RETURN.
+24 VDC IS ON TP1; TP3 IS RETURN.
NO
SYMPTOM — NO CALIBRATION GAS FLOW (CONTINUED)
NO
37740009
YES
YES
CIRCUIT BOARD IS
FAULTY. REPLACE
CIRCUIT BOARD.
REPLACE THE SOLENOID
WITH NO FLOW.
CONTINUED
FROM SHEET
1OF2
NOTE 1:
NOTE 2:
CHECK +5 VDC AND +24 VDC.
SEE NOTE 1.
CHECK SOLENOID 1 AND
SOLENOID 2. (SEE NOTE 2 FOR
INSTRUCTIONS).
SOLENOID
1 AND 2
OK?
UNPLUG J5. CONNECT SOLENOID PINS 1 AND 3
TO +24 VDC ON TP1. TP3 IS RETURN.
REPEAT FOR SOLENOID 2 CONNECTED TO J6.
IF FLOW STARTS THEN STOPS AFTER SEVERAL
SECONDS, THE PRESSURE SWITCH MAY BE BAD.
TO TEST PRESSURE SWITCH, UNPLUG FROM J3
AND INSTALL JUMPER ACROSS J3 TERMINALS.
THEN, RESTART CALIBRATION. IF THIS CORRECTS
THE PROBLEM, THE PRESSURE SWITCH IS BAD;
REPLACE IT.
ADDITIONAL INFORMATION