ALTEC AIR, LLC
P550W Series Air Dryers User’s Guide
Page 56 of 98
P011658 – Rev. S
9.3 Measuring Compressor Voltage
9.3.1
Open Panel (see section 0).
9.3.2
Locate the relay terminal block on the control board inside the air Dryer.
With the Compressor running
:
9.3.3
Use a Voltmeter to measure across the board terminals where wires #5 and
#6 are connected.
The voltage should measure
120 VAC
(120V models) or 240 VAC (240V
models)
With the Compressor NOT running
:
9.3.4
Use a Voltmeter to measure across the board terminals were wires #5 and
#6 are connected.
The voltage should measure
0 VAC
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits.
It is highly recommended that you remove all
jewelry before performing any procedures.
