MAN - RTFO - REV: Org | G. Troubleshooting
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4. If the unit still has no air flow please contact the ATS service department at +1-724-283-1212.
G.6 Unit Will Not Heat
1. Verify that there is power to the unit - refer to (Sec. G.2).
2. If the unit still will not heat, check the temperature controller on the front of the unit to
verify that it is turned on and that the SV temperature is higher than the PV temperature.
If not, adjust.
3. If the unit still will not heat or the temperature controller will not turn on, open the side
panel and refer to (Fig. C4) - Panel Layout to locate Fuses 1 & 2. These fuses are for the
24VDC supply. Remove and inspect the fuses, if a fuse is defective, replace it with a new
fuse of the correct type and rating. If the unit still will not heat after replacing the fuses,
please contact the ATS Service Department at +1-724-283-1212.
4. If the fuses are functioning properly but the unit still will not heat, check the Heat
Control to ensure it is functioning properly. Refer to (Sec. C.4) for location. If functioning
properly, the green light on the Heat Control should be illuminated (Fig. G.5). If the green
light is not illuminated, please contact the ATS Service Department at +1-724-283-1212.
5. If the heat control light is green but the unit still won’t heat, perform a visual check of
the heat coils for any breaks. As the coils are very sensitive, do not physically touch,
move, or alter the coils. A broken coil will be completely disrupted and obvious to the eye.
If there is a broken coil, please contact the ATS Service Department at +1-724-283-1212.
Figure G.5: RTFO
heat control
