Instruction Manual
SPS 4001B
Figure 5-1. SPS 4001B Troubleshooting Flowchart (Sheet 2 of 2)
SYMPTOM — NO CALIBRATION GAS FLOW (CONTINUED)
CONTINUED FROM SHEET 1 OF 2
CHECK +5 VDC AND +24 VDC. SEE NOTE 1.
+5 VDC | NO |
AND +24 VDC |
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±10%? |
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NOTE 1: +5 VDC IS ON TP2; TP3 IS RETURN. +24 VDC IS ON TP1; TP3 IS RETURN.
NOTE 2: UNPLUG J5. CONNECT SOLENOID PINS 1 AND 3
TO +24 VDC ON TP1. TP3 IS RETURN.
REPEAT FOR SOLENOID 2 CONNECTED TO J6.
CIRCUIT BOARD IS
FAULTY. REPLACE
CIRCUIT BOARD.
YES | ADDITIONAL INFORMATION |
CHECK SOLENOID 1 AND
SOLENOID 2. (SEE NOTE 2 FOR
INSTRUCTIONS).
SOLENOID | YES | CIRCUIT BOARD IS | ||
1 AND 2 |
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| FAULTY. REPLACE | |
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OK? |
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| CIRCUIT BOARD. | |
| NO |
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REPLACE THE SOLENOID |
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WITH NO FLOW. |
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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.
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