Gentherm 5220 Operating Manual page 61

28142 Rev 15
Change in Fuel Pressure
Refer to the last entry in the log and determine if the fuel pressure has changed. If
fuel pressure has changed, re-adjust the fuel pressure to match the last entry. If this
returns the measured voltage to within 0.2 V of required V
A dirty fuel filter may cause a drop-in fuel pressure. A plugged fuel orifice will
NOTE:
change fuel flow without a change in fuel pressure.
Change in Air Flow
Check for obstructions at the cooling fins and the air filter stabilizer. Adjust the air
shutter, see Adjustment section. If this returns the measured voltage to within 0.2
V of required V
Change in Fuel Quality
To maintain consistent power output, it is essential that the TEG be supplied with
fuel of a constant heating value. If TEG power levels are fluctuating, a change in fuel
composition may have occurred. For natural gas applications, consider the possibility
of activity upstream of the TEG in the fuel supply such as a wellbeing stimulated. For
tanked propane applications, consider when the propane tanks were last filled.
If all the above causes have been ruled out, the TEG may require more than just
routine servicing. Keep the TEG operating for now and see Troubleshooting (Section
10) for guidance.
Routine Service
Basic annual servicing is all that is required unless other maintenance is indicated by the V
evaluation. Follow these steps to perform a routine annual service:
Shut the TEG down and allow it cool. See Startup and Shutdown (Section 6).
Drain the pressure regulator sediment bowl. See Draining the Sediment Bowl (Section
9.2.1).
Check the fuel filter (Part# 22361) in the pressure regulator and replace if necessary.
See Fuel Filter Replacement (Section 9.2.2).
Check the fuel orifice and replace if necessary. See Fuel Orifice Replacement (Section
9.2.3).
Remove any debris, sand or dust from the cooling fins, air filter stabilizer and cabinet
interior. See Air Filter Cleaning (Section 10.1.1).
Ensure all bolts and wire connections are tight.
Start the TEG. See Startup and Shutdown ( Section 6).
Check V
set
and Adjustment (Section 8), as applicable. Record the final setup in the TEG
Performance Log before leaving site.
Gentherm Global Power Technologies
proceed with Routine Service.
set
and adjust the TEG if necessary. See Power Output Evaluation (Section 7)
MAINTENANCE
, proceed with Service.
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