TM 10-5410-228-24
2.8
UNIT LEVEL TROUBLESHOOTING PROCEDURES Continued.
22. NO HOT AIR WHEN OPERATING WITH `EXT' (10 kW TQG) POWER.
NOTE: The heater will not run if the
Turn system off.
ambient air temperature is
Gain access to ECU back covers.
too warm to satisfy the
Open back cover.
thermostat.
Turn TQG on.
Set ESS MODE selector switch to HEAT.
Set TEMP CONTROL to HOT.
Set HEAT STAGE 1 circuit breaker and
switch to ON.
Gain access to heating element HTR1.
Test for 208 Vac across terminals.
Is
Yes
Notify direct support to
208 Vac
change heater element.
present?
No
Turn system off.
Turn TQG off.
Open forward control panel to gain access to
cable assembly 1A4A1W2.
Disconnect cable assembly 1A4A1W2-J2
from J2.
Test cable assembly 1A4A1W2 pins G & H
for continuity per Fig. 2-47 sheet 15.
Does
No
Repair cable assembly
1A4A1W2.
exist?
Yes
1
