92
TFIO module isolation test
This test will need to be performed if the unit is configured to include TFIO modules, the
unit’s battery pack output voltage is not
remaining consistent and no errors were found during the previous auxiliary equipment isolation test.
Step-by-step instructions
Disconnect the solar panel charger or AC charger.
Disconnect the battery pack cable from the XRC
G4
board, and substitute a known good battery, if not already done.
Disconnect the TFIO module cable from the J18 I/O expansion connector, remote communications equipment and
auxiliary equipment.
Connect the current measurement troubleshooting cable (Part No. 2017350-xxx, see Figure 82) to a known good battery,
and connect to the XRC
G4
board.
Using the DMM, measure the average current. If equal to or greater than 80 mA at 12 Vdc, disconnect the battery pack,
reconnect TFIO module cable with one module connected, and continue to next step.
Using the DMM, measure the average current. Low power TFIO modules generally do not draw over 0.30 mA at 12 Vdc.
If the average current drops less than or equal to 0.30 mA, disconnect the battery pack and connect one additional
module. Repeat this step for additional modules until all have been connected or equipment fault has been located.
If a power drain has not been located, return to the
Power troubleshooting flow chart
(see
SLEEP mode
The SLEEP mode is a safety feature which maintains the RAM but discontinues data measurement calculations and control
functions. When the
XRC
G4
is in the SLEEP mode, the word SLEEP is displayed on the
LCD. If
XRC
G4
battery voltage falls
below 11 Vdc,
the
XRC
G4
enters SLEEP mode.
If battery voltage is still below 10.9 Vdc, when disconnected locally, the
XRC
G4
returns to SLEEP mode. If battery voltage is
above 11 Vdc,
the XRC
G4
remains awake.
The
XRC
G4
has a real-time clock which maintains time and date during SLEEP mode and writes an event record when entering
and leaving the SLEEP mode.
Upon wake-up, the
XRC
G4
performs the following functions:
–
Stores present calculation period accumulations in historical record.
–
Zeros present calculation period accumulations.
–
Ends current daily record and starts a new daily record.
Step-by-step instructions
Connect locally to the
XRC
G4
. This should wake up the unit to then be able to determine the cause of SLEEP mode.
Check the battery pack cable. It must make a good secure electrical connection with XRC
G4
board BATT connector J16
(see Figure 77:
Battery charger and battery pack connections
).
If the battery pack cable is securely connected, check the battery pack voltage. If voltage is low, replace with another
battery pack.
Reset procedures
The
XRC
G4
operating system can be reset through either a COLD or WARM start procedure. The decision to use these
procedures should only be made by an experienced technician.
COLD start overview
A COLD start clears all the data that is stored in RAM as well as resetting all entered variables to their factory default values or
to the values last written to the tfCold drive by the Save and Restore utility. A COLD start should be used for new
XRC
G4
installations. This will ensure that all memory is clear and the operating program is at its default settings. Discretionary use of
this procedure is advised.
