Electrical Maintenance (Rev 1/99)
30
NOTE: Do not run a R-134a unit to -26 F (-32 C). R-404A
units may be operated at -24 F (-32 C).
Setpoint Differential Adjustment
Adjust the thermostat setpoint differential to 4 F (2 C).
1. Remove the cab control box from its bracket.
2. Remove the cover from the back of the cab control box.
Adjust Setpoint Differential
1. 1 Amp Fuse
2. 12/24 Volt Jumper
3. Main Harness Plug
4. Dip Switches
5. Sensor Plug
6. Setpoint Differential Potentiometer Set to 12 o’clock position
3. Turn the adjusting potentiometer to the 12 o’clock posi-
tion.
4. Replace the cover and place the cab control box back in
its bracket.
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