Table of Contents
Advertisement
28142 Rev 15
The L/C and Limiter assemblies normally require no maintenance. If the TEG is producing
required V
but it is not supplying expected power to the load, then the operation of the L/C
set
or Limiter should be checked and serviced as necessary. Use the procedures below to help
determine if the L/C or Limiter could be damaged.
Check the Dipswitch Settings (L/C only)
Check the selector dipswitches are set correctly for the model 5220-24V.
NOTE:
Switch 1 and Switch 2 should both be OFF.
Check the Electronics Input Voltage
Follow these steps to check the input voltage to the L/C or Limiter assembly:
1.
Disconnect the customer load from TB-1 terminals 6 (-) and 7 (+) for an L/C assembly
(Model 5220-24V), or TB-1 terminals 4 (-) and 5 (+) for a Limiter assembly (Model
5220-12V).
2.
Place the jumper clip in the RUN position between terminals 1 and 2 of TB-1.
3.
Connect a voltmeter between terminals 2 (+) and 4 (-) of TB-1.
4.
Wait for the TEG to reach nominal operating temperature, providing a stable voltage
measurement on the voltmeter. Allow 1 hour if the TEG was just started from cold.
5.
Evaluate the voltage measurement on the voltmeter. Unloaded input voltage should
be about 16 V on an L/C assembly, or 14.1 V on a Limiter assembly. If values are
atypical, likely suspects are an electrical short, damaged circuit board, or power unit.
Check the Electronics Output Voltage
Follow these steps to check the output voltage from the L/C or Limiter assembly:
1.
Isolate the TEG from the customer load and batteries by opening the fuse or circuit
breaker through which it is connected.
2.
Place the jumper clip in the RUN position between terminals 1 and 2 of TB-1.
3.
Connect a voltmeter between TB-1 terminals 6 (-) and 7 (+) for an L/C assembly
(Model 5220-24V), or TB-1 terminals 4 (-) and 5 (+) for a Limiter assembly (Model
5220-12V).
4.
Adjust the output voltage by turning the output voltage adjustment pot (shown in
Figure 6 or Figure 7). If the unloaded output voltage, seen on the voltmeter, does not
change when the adjustment pot is turned, the electronics assembly needs to be
replaced.
If the TEG produces the required V
NOTE:
operating properly, but still do not provide expected power to the load, then
the power unit should be checked next.
Gentherm Global Power Technologies
and the electronics appear to be
set
TROUBLESHOOTING
Page 70
Hide quick links:
Advertisement
Table of Contents
