7-1
GF Series
Installation and Operation Manual
X-TMF-GF Series-MFC-eng
Part Number: 541B137AAG
March, 2010
Section 7 System Troubleshooting
7-1 Introduction
This section includes an OEM tool Troubleshooting Checklist and an
GF1XX Troubleshooting Guide that identifies symptoms, possible causes,
and corrective actions.
7-2 OEM Troubleshooting Checklist
1. Check environmental factors that could affect changes to GF1XX
performance. The most common environmental factors are listed in
Table 7-1.
2. Check supply voltage and check for a consistent ground.
3. Insure OEM tool setpoint matches the setpoint at the GF1XX. Observe
for consistency.
4. Verify isolations valves are open and the gas supply is turned on. Then
verify operating pressures are within operating ranges.
5. Check GF1XX voltage response by moving the setpoint back and forth.
Observe for voltage changes.
Table 7-1 Environmental Factors
GF1XX Performance Possible Causes
Inaccurate flow. Temperature shift (steady state or transient).
Inlet pressure shift (steady state or transient).
Power supply problem.
Electrical interference
Dirty gas chamber
Changes in gas.
Control problems. Can Differential pressure not within operatiing range
not reach setpoint. Inlet pressure not stable
Oscillation.
Zeroing problems, Indicated Temperature shift (steady state or transient).
zero is not stable. Inlet pressure shift (steady state or transient).
Power supply problem.
Electrical interference
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