Set-Point Mode (Sp0); Test Fridge Voltage; Sensor Troubleshooting Test; Max/Min Fridge Voltage Record - ARP Fridge Defend Troubleshooting Manual

ARP Control v5.x Troubleshooting Guide
NO SET-POINT MODE (SP0)
The No Set-Point mode is used for testing
of the refrigerator.
Caution must be used because the
fridge has no overheat protection other than
the factory thermal management methods.
To place the control in the No Set-Point
mode, first turn off the control (See User
Guide), then hold down the Display button
and then momentarily press the On/Off
button. SP0 will display briefly, and then
flash the dot in upper left and center every
2 seconds thereafter. Always turn this mode
off when tests are completed, restart in the
ARP mode so that your fridge has
protection from overheating.

10.1 Test Fridge Voltage

The Display button has the same functions
as in the ARP Control mode; please see the
User Guide for more on this subject. Use of
the SP0 mode is handy for diagnostics
without the fridge turning off.
When in the ARP or
rd
3 function for the Display button; the 3
function reads the fridge voltage. This is
04/20/202
SP0 mode, there is a
rd
0 © 2013-2020 ARPC L.L.C. All rights reserved.
handy for diagnosing a fridge that will not
turn on. If either a Dometic or Norcold has
less than 10.5 volts, the fridge will not turn
on.
In addition, reading the voltage on the ARP
yellow wire has the advantage of deterring
if there is AC current on the line. When
there is excessive AC current on the RV
12VDC line, appliances like the fridge will
not function properly. If AC is present, the
voltage value will jump around. For
example, the sequence of readings may
look like this:
16.5, 12.1, 9.8, 14.0, 12.0...
If AC is detected on the line, unplug the RV
from AC, if this corrects the problem your
inverter many have an issue.

10.3 Sensor Troubleshooting Test

th
The 4 value viewed by the Display button
is for checking the wiring installation. Use
this reading in combination with the RTD
Troubleshooting below. The value should
read 280, if the value is not 280; contact
ARP Control for further information to solve
sensor issues.
10.4 MAX/MIN Fridge Voltage
Record
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The 5 value viewed by the Display button
is the maximum and minimum voltages
seen while in this display mode. The display
will keep alternating & updating the highest
voltage and the lowest voltage seen by the
control when in this mode of operation.
This gives the user the ability to run a test
for an extended period of time without being
present.
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