Air Dryer
5 Troubleshooting
5-2 How to reset the thermal
relay and high pressure switch
5 - 3
IDX-OM-I076
IDFA Series
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5-2 How to reset the thermal relay and high pressure switch
If light goes off during operation and refrigerating compressor stops, the thermal relay or high pressure switch
(for only the IDFA55E and IDFA75E) to protect the refrigerating compressor starts operating and needs to be
reset manually. For the position of the thermal relay and high pressure switch, refer to page 1-1.
Before resetting the thermal relay and high pressure switch identify and cure problem that caused the unit to trip
out, by referring to
“5-1 Cause and countermeasure for errors”.
Danger
Be sure to turn off the Switch with lamp.
How to reset a thermal relay
1) Turn off the Switch with lamp.
2) Take off the front panel. The thermal relay as shown on right
figure can be found on the power supply terminal base.
3) Confirm that a green indication does not appear in the
indication window of thermal relay.
If the green indication appears, there are other possible causes
and contact an SMC Authorized Dealer keeping the power supply on.
4) Press the blue reset button and confirm that the green indication
comes to appear at the indication window.
5) Put back the front panel.
6) When the Switch with lamp is turned on, the product will restart
operation.
How to reset a high pressure switch
1) Turn off the Switch with lamp.
2) Take off the front panel. The high pressure switch can
be found at upper right part of power supply terminal
base.
3) Press the red reset button.
4) Put back the front panel.
5) When the Switch with lamp is turned on, the product will
restart operation.
Reset
button (Blue)
【
IDFA55E
】
Thermal relay
High pressure switch
High pressure
switch bracket
Reset button
(Red)
Indication
window
Reset
button (Blue)
【
IDFA75E
】
