62-11640
7–48
00098
CHECK HIGH TEMP THERMOSTAT
• ACTIVATION: With the Main Power switch toggled out of the OFF position, the EVHTS circuit is open.
• UNIT CONTROL: Engine and Electric Operation: Alarm AND no heat allowed.
• RESET CONDITION: Auto Reset when the EVHTS circuit is okay for 15 minutes, or alarm may be manu-
ally reset via keypad or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check Evaporator Area For High Temperature
Check Evaporator temperature using a test thermometer. EVHTS opens when the temperature of the
evaporator becomes very high (Refer to
). (For example, if the heaters are on when the
fan is not running.) If the temperature of the evaporator section is very warm (hot), it will have to cool
down before the EVHTS closes.
2.
Check High Temperature Thermostat (EVHTS)
Inspect thermostat and connector. (See wiring schematic
) No damage to thermostat.
No damage or corrosion in connector.
3.
Check High Temperature Contacts
a. Contacts must be closed when temperature is normal. Unplug EVHTS and check for continuity.
Must be 0 (zero) Ohms. Cannot be opened (infinite ohms) or shorted to ground. If HTT is open
below temperature, (Refer to
b. Check ground at 2CCB35. If ground not good, check connectors and wiring between terminals for
damage, moisture or corrosion.
c. Check SP
−
71, SP
−
72, SP
−
50. If ground not good, check connectors and wiring between terminals
for damage, moisture or corrosion.
Summary of Contents for Vector 8500
Page 23: ...62 11640 1 6 1 3 SAFETY DECALS ...
Page 24: ...1 7 62 11640 62 03958 ...
Page 25: ...62 11640 1 8 ...
Page 26: ...1 9 62 11640 ...
Page 27: ...62 11640 1 10 ...
Page 125: ...62 11640 SECTION 6 MESSAGECENTER PARAGRAPH NUMBER Page 6 1 MESSAGECENTER MESSAGES 6 1 ...
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