6 - 19
–+ELEC
ÊThe thermo switch circuit is open.
ËThe thermo switch circuit is closed.
Test step Water temperature Continuity
1TT-R90:
Less than 23 ± 3 °C
(73.4 ± 5.4 °F)
TT-R90E:
Less than 16 ± 3 °C
(60.8 ± 5.4 °F)YES
2TT-R90:
More than 23 ± 3 °C
(73.4 ± 5.4 °F)
TT-R90E:
More than 16 ± 3 °C
(60.8 ± 5.4 °F)NO
3TT-R90:
More than 12 ± 4 °C
(53.6 ± 7.2 °F)
TT-R90E:
More than 11 ± 3 °C
(51.8 ± 5.4 °F)NO
4TT-R90:
Less than 12 ± 4 °C
(53.6 ± 7.2 °F)
TT-R90E:
Less than 11 ± 3 °C
(51.8 ± 5.4 °F)YES
Test steps 1 & 2: Heating phase
Test steps 3 & 4: Cooling phase
WARNING
Handle the thermo switch with special
care.
Never subject the thermo switch to
strong shocks. If the thermo switch is
dropped, replace it.
Check the thermo switch operation.
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CARBURETOR HEATING SYSTEM
