Neutronics H1301 - Page 77

Model H1301 Recovery and Recycling System
Installation, Operation and Maintenance Manual
Revision-L September, 2019
Page 77 of 105
VII. System Maintenance Procedures
M. Pressure Controller Adjustment and Calibration (continued)
6. Pressure Controller Alarm Output Troubleshooting
Required Materials:
 Voltmeter: 20 VDC and 200 VAC Ranges
a. Place the System Power Switch to the ON position.
WARNING! THE AREA INSIDE THE CONTROL PANEL HOOD CONTAINS
120VAC POWER CONNECTIONS; DO NOT REST ANY PART OF
YOUR BODY ON ANY OF THE INTERNAL COMPONENTS.
b. Configure the voltmeter for DC voltage measurement.
c. Connect the negative voltmeter probe to the PLC -24VDC. Connect the voltmeter
positive probe to the PLC +24VDC Terminal and verify a 24 +/-3VDC voltmeter
measurement.
NOTE: If a 24 +/-3VDC measurement is not obtained: the PLC should be replaced.
d. With the negative voltmeter probe connected to the Machine Computer -24VDC
Terminal; Verify +24VDC at the Pressure Controller J1-7 and J1-10 terminals using
the voltmeter positive probe.
NOTE: If 24VDC is not present: the wire run from the Machine Computer terminal #2
(red wire) to the Pressure Controller is not intact
e. With the negative voltmeter probe connected to the Machine Computer -24VDC
Terminal; depress and hold the controller test switch. Connect the voltmeter
positive probe to the Pressure Controller J1-8 terminal and verify a voltage
measurement that toggles from 0 to 24 VDC +/- 3 VDC. Repeat this procedure for
the Pressure controller J1-11 terminal.
NOTE: If the voltage does not toggle on and off the pressure controller must be replaced.
f. With the negative voltmeter probe connected to the Machine Computer -24VDC
Terminal; depress and hold the controller test switch. Connect the voltmeter
positive probe to the PLC #A2 input terminal and verify a voltage measurement that
toggles from 0 to 24 VDC +/- 3 VDC. Repeat this procedure for the PLC #A3 input
terminal.
NOTE: If the voltage does not toggle on and off the wire runs from the pressure controller
to the PLC are not intact. If the voltage does toggle on and off but the PLC #A2 and #A3
input LEDs do not toggle on and off the PLC must be replaced.