Gentherm 5220 Operating Manual page 73

28142 Rev 15
NOTE:
Switch should close at pressures above 13.8 kPa (2 PSI).
6. Remove fuel pressure from the switch by closing the manual gas valve.
Check the Internal Battery Voltage
Follow these steps to check the battery voltage:
1. Open the door of the L/C or Limiter electronics enclosure mounted on the right side
of the generator cabinet.
2. Locate the battery wiring harness connector plugged into the FPCi board, see Figure
32 and Figure 33.
3. Carefully probe the back of connector, measuring the voltage between the red and
black terminals of the battery wiring harness connector. The voltage should be greater
than 6 V.
4. If the voltage is less than 6 V the battery assembly needs recharging or replacing.
Check the Thermal Cutoff (TCO)
The model 5220 TEG is equipped with a thermal cutoff (TCO) attached to the pressure switch.
The TCO is a safety feature that prevents damage to the burner and fuel system. If cabinet
temperatures exceed safe limits, a thermal fuse in the TCO assembly will open, closing the
solenoid valve and shutting down the TEG. The thermal fuse in the TCO cannot be reset, and
if it has been activated, the TCO must be replaced.
If the TCO has been activated, the TEG will neither spark nor flow fuel, even if fuel pressure
is supplied and the SI system has power. To check the TCO, follow these steps:
1. Disconnect the TCO from the pressure switch
2. Using a digital multimeter, check the continuity of the TCO. If the fuse is open, and
continuity cannot be established, replace the TCO.
A replacement Thermal Cutoff Assembly (part number 300074) can be ordered from GPT. Do
not use any other thermal fuse.
Gentherm Global Power Technologies
Use only the thermal cutoff (TCO) supplied by GPT.
CAUTION!
Use of a different thermal fuse may result in fuel
system component failures or unreliable operation.
TROUBLESHOOTING
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