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TK 55032-18-OP-EN
Inspection Troubleshooting
1. If a return air temperature reading is not within the desired temperature
range, refer to (
). Correct the problem as needed.
2. Repeat the Enroute Inspection every 30 minutes until the compartment
temperature is within the desired temperature range. Stop the unit if the
compartment temperature is not within desired temperature range on
two consecutive 30 minute inspections, especially if the compartment
temperature appears to be moving away from the setpoint.
3. Immediately contact the nearest Thermo King Dealer.
4. Take the necessary steps to protect and maintain proper load
temperature.
Table 2.
Inspection Troubleshooting
Problem
Cause
Remedy
Return air
temperature
reading is not
within desired
temperature
range of the
setpoint.
Unit has not had time to
cool cargo to correct
temperature.
Refer to load log history. Look for above
temperature load records, properly pre-
cooled cargo compartment, length of time
on road, etc. Correct as required. Continue
monitoring return air temperature until
reading is within desired temperature range
of the setpoint.
Unit may have a low
refrigerant charge
Contact nearest Thermo King dealer, or call
the Thermo King Cold Line for referral.
Unit is in defrost or has
just completed a defrost
cycle.
Monitor return air temperature after defrost
cycle is completed to see if temperature
returns to desired temperature range of the
setpoint.
Note:
Temperature will increase slightly
during defrost cycle.
Evaporator is plugged
with frost.
Initiate a manual defrost cycle. Defrost
cycle will automatically terminate when
complete. Continue monitoring return air
temperature until reading is within desired
temperature range of the setpoint.
