TotalFlow uFLO, User Manual, Page: 86 / 132

4-22
Troubleshooting Alarms
Alarm conditions and their probable cause, and procedure(s) for correcting the problem, are presented
below in Table 4–6.
Table 4–6 Troubleshooting Alarm Codes
In the following procedure, the common name for a component or it’s jumper number if available
(abbreviated J) or part is followed by a number in parentheses. This refers to the call out item
number referenced on each drawing.
Alarm
Condition
Probable
Cause Procedure
SLEEP Battery Voltage Below
10.9 VDC
1. Make a local connection with the
µ
FLO. This wakes up the unit so that
you may check all alarm conditions and determine the problem.
2. Check battery pack cable. It must make a good secure electrical
connection with the main board BAT CONN connector J6 (Figure 4–5,
Item 3).
3. If battery pack cable is securely connected, check battery pack
voltage. If voltage is low, replace with another battery pack.
L
C
Charging Source
Below 0.4 Vdc Plus
Battery Pack Voltage Check battery pack charging source with PCCU Monitor Mode. This is for
either Solar or externally connected charging sources.
L
C
Solar Power Charging
Unit
1. In low sun light conditions, the display normally shows
L
C
.
2. Check solar panel angle and direction. In northern hemisphere, panel
should face due south and in southern hemisphere, due north.
3. Check solar panel for any physical damage or obstructions to sunlight.
Sunlight obstruction prevents solar panel from receiving enough
sunlight to charge installed battery pack.
Solar panel should be positioned so it receives the most sunlight. Do not
place it in a shaded area.
4. Check solar panel wiring to be certain it is correctly connected to
associated
µ
FLO 2100767 Board termination block J7 (Figure 4–5,
Item 4).
5. Solar panel should be checked under load, using a diagnostic test kit.
If solar panel wiring is correct, sunlight is not obstructed and voltage does
not increase above 0.4 VDC under bright sunlight, replace Solar Panel.
L
C
AC Power Unit
1. Check AC charger wiring to
µ
FLO termination block connector J7
(Figure 4–5, Item 4). Be certain wiring is correct.
2. Check input AC voltage to external AC charging unit. Be certain
primary AC voltage is correct.
3. If input primary AC voltage level is correct, wiring to
µ
FLO
µ
FLO
2100767 Board terminal is correct and there is no DC output from the
charger, replace charger fuse.
4. If fuse is not faulty or there is no charger DC output voltage after
replacing fuse, replace AC charging unit.
A
D
A/D Converter is Over
or Under Range This alarm condition can be caused by differential pressure, static pressure
or the temperature being out of measurement range.
•
Check SP, DP and temperature to determine which measurement
channel is causing the alarm. In the PCCU Entry screen, enter the
Monitor mode by clicking on the I/O subsystem.
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