Table 4-2. TROUBLESHOOTING FOR UNIT MAINTENANCE
TEST OR INSPECTION
Step 3. Inspect shelter or van for openings that allow cold air to move inside.
Seal all openings.
Step 4. Check for air movement out of discharge air outlet louver and into return
This unit can operate in temperatures as low as -50 F (10 C).
However, depending on shelter or van size, heat loss, and amount of
heat generated by equipment, heat output in the LO HEAT mode
may or may not heat shelter or van to a comfortable level.
Step 5. Check thermostatic switch S3.
Step 6. Check mode selector switch S.
Allow heater elements to cool before handling. Severe burns can
result from touching heater elements.