IB-106-340
5-20
INTERFACE BOARD IS
NOT SENDING SIGNAL.
REPLACE INTERFACE
BOARD PER PARAGRAPH
6-10b.
IS THERE
FLOW?
SECURELY TIGHTEN ALL J3 SCREW TERMINALS ON
POWER SUPPLY BOARD TO MAKE CONNECTIONS.
NO
SYMPTOM — NO TEST GAS FLOW (CONTINUED)
NO
NO
NO
27610002
NO
NO
NOTE 4: IF CHECKING CAL GAS 1 SOLENOID CONNECTOR J5,
ENSURE CAL RET TERMINAL IS JUMPERED TO HI GAS
TERMINAL OF J3. IF CHECKING CAL GAS 2 SOLENOID
CONNECTOR J4, ENSURE CAL RET TERMINAL IS
JUMPERED TO LO GAS TERMINAL OF J3.
YES
YES
YES
YES
DISCONNECT CAL GAS
LINE AT CHECK VALVE.
REPLACE POWER
SUPPLY BOARD PER
PARAGRAPH 6-10b.
REPLACE SOLENOID
PER PARAGRAPH 6-10c.
DISCONNECT CAL GAS LINE
AT MANIFOLD OUTPUT PORT.
REPLACE PRESSURE SWITCH
PER PARAGRAPH 6-10d.
DISCONNECT SOLENOID FROM
POWER SUPPLY BOARD AND USE
METER TO MEASURE ACROSS
TWO OUTER PINS OF BOARD
CONNECTOR. SEE NOTE 4.
CHECK BOTH SOLENOIDS.
REPLACE CHECK VALVE
PER PARAGRAPH 6-10e.
SEE NOTE 3.
REPLACE CLOGGED
CAL GAS LINE BETWEEN
CAL GAS FLOWMETER
AND CHECK VALVE.
DISCONNECT CAL GAS LINE
AT TOP FITTING OF CAL GAS
FLOWMETER.
REPLACE FAULTY CAL GAS
FLOWMETER PER PARAGRAPH
6-10h.
YES
YES
CONTINUED
FROM SHEET
1 OF 2
NOTE 1:
NOTE 2:
NOTE 3:
PLACE JUMPER BETWEEN CAL
RET TERMINAL AND EITHER HI
GAS OR LO GAS TERMINAL OF J3.
SEE NOTE 1.
USE METER (SEE NOTE 2)
TO CHECK FOR SHORT
BETWEEN CAL RET AND NO GAS
TERMINALS OF J3.
IS THERE
A SHORT?
IS THERE
+30VDC?
IS THERE
FLOW?
IS THERE
FLOW?
IS THERE
FLOW?
USE A SIMPSON MODEL 260 OR EQUIVALENT
MULTIMETER.
IF REPLACING THE CHECK VALVE DOES NOT
CORRECT THE PROBLEM, A CLOG COULD EXIST IN
THE RED SILICON GAS TUBE WITHIN THE PROBE.
Figure 5-15. SPS 4000 Troubleshooting Flowchart (Sheet 2 of 2)
Summary of Contents for Oxymitter 4000
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