5 Troubleshooting
XSeriesG4 Remote Controller User's
manual
2103334 Rev. AB
| 87
–
Connect a jumper wire between terminals 4 and 5.
Clip the positive lead of the DMM to the upper side of the RTD test resistor.
Clip the negative lead of the DMM to the lower side of the RTD test resistor.
Supply power to the unit.
Once running, the measured value across the RTD test resistor should be either:
–
100 Ohm Resistor
– Min. of 100mv to a maximum of 125mv
–
123 Ohm Resistor
– Min. of 123mv to a maximum of 155mv
The RTD measurement temperature on the FCU display should read either:
–
100 Ohm Resistor
– 31.0°F to 33.0°F
–
123 Ohm Resistor
– 140.8°F to 142.8°F
If either of the measured values are outside of range, remove power and replace the termination board connector cable
(1801415-xxx).
Return power and perform steps 9 and 10. If either of the measured values are outside of range, remove power and
replace the termination board (2101873-xxx).
Return power and perform steps 9 and 10. If either of the measured values are outside of the range, remove power and
replace main electronic board (2101471-xxx) and XIMV (2101465-xxx).
RTD impedance test
If readings from the RTD are still suspect following the RTD probe test, follow the instructions below to test the current source on
the termination board to verify it is receiving power.
Required equipment
–
Ice bath
–
Digital multimeter
Step-by-step instructions
Immerse the RTD Probe in an ice bath.
Perform a continuity check between any two similarly colored wires. Measured resistance should be 1 Ohm or less.
Perform a continuity check between any two dissimilar colored wires. Measured resistance should be approximately 100
Ohms.
Perform a continuity check between shield wire and any other wires. Measured resistance should be in the Mega Ohm
range.
If any values are returned out of range, the RTD probe is defective. Replace the RTD.
Power troubleshooting
Overview
This section focuses on determining what has caused the XRC
G4
to lose power. Generally, loss of power can be attributed only
to the power supply system. However, if the power supply system is used for powering a transceiver, or other peripheral
equipment, a problem with that equipment may drain the battery and cause the XRC
G4
to lose power. Notice that the
Power
troubleshooting flowchart
(Figure 80) goes through several tests but also directs the user to Figure 79:
Communication
troubleshooting flowchart
located later in this section.
