7−52
62-11389
Alarm
NO.
Steps Alarm/Cause Corrective Action
77 EVAP MOTOR OVERHEATED - Continued
6 Check Evaporator Fan Motor
Disconnect power plug at motor Test IP circuit for continuity using ohmmeter
If open, remove and replace motor
If closed, then an intermittent IP circuit is suspect.
Check phase to phase and phase to ground for short
or open circuits. Refer to Section 2.11 for correct
electrical values.
If motor tests good, check the DC IP circuit to
microprocessor.
7 Check Motor Operation
Turn the unit ON Check current on each phase (must be less than
shown on Section 2.11).
Check voltage on each phase (must be at within lim-
its shown in Section 2.11.)
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