Unipower ARE-M02406 Product Manual page 61

Micro ARE-M Series 24V Chargers, Single Phase Maintenance
Capacitors - First, isolate capacitors and then check with an ohmmeter. Proper scale range will vary as to type
of meter and capacitor size. Start with highest range and work down. Reverse leads each time. If the capacitor
is good, it will show a deflection towards zero resistance initially, then a steady increase toward infinite
resistance. If, however, the capacitor is shorted, it will show zero resistance. If the capacitor is open, it will
read infinite resistance.
Resonant Triac - Remove either the MT1 or MT2 triac connection, being careful not to remove gate wire, and
check with an ohmmeter. See the drawing below for triac terminals. A good triac will indicate high resistance
in both directions.
To check for turn on of the triac, with one lead still disconnected, connect the positive lead of an analog
ohmmeter to the anode of the triac (MT2) and the negative lead to the cathode (MT1). The triac should read
open or high resistance. Connect the gate to the anode with a jumper. A low resistance reading indicates that
the triac is turning on.
PM990-1070-24, Issue 12
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