ARP Fridge Defend - 123 Numbers on Display (Not an Error); Err (First Dot on Upper Left); Opn Boiler Sensor

ARP Control v5.x Troubleshooting Guide 0 © 2013-2020 ARPC L.L.C. All rights reserved. 10 04/20/202
SHt
3.5
Boiler Sensor Error Short beep every second
-LO
3.6
Boiler Sensor Out Of Range
*O*F*8
3.7
ARP Has Attempted to Restart Fridge 5 Times and
Failed Fast and short beep
*H*O*8
3.8
Excess Temperature Shutdown (Boiler has reached
250C)
Fast and short beep
OR (OA)
3.9
Fan Sensor Out Of Range (not an error)
bAd
3.10
Auto Tune Failure
F4 or F5
3.11
Contact ARP Control (only tested by operator with
SetUp button)
E 8
3.12
Contact ARP Control
E10
3.13
ARP Relay Error Short beep every second
E11
3.14
Contact ARP Control Continuous alarm
SPT Error
(IEC type test)
Section Nature of Error
Audible Alarm
(v5.1 only)
F1
3.15
MCU ADC Error Checker
F2
3.16
ARP Relay Error Short beep every second
F3
3.17
Boiler Sensor ADC Cal Short beep every second
F6
3.18
MCU Set-Point Memory CRC Short beep every second
F7
3.18
MCU Set-Point Tune Memory CRC Short beep every second
E12
3.19
MCU Port Registry
E13
3.18
MCU Code Memory CRC
E14
3.19
MCU Program Counter
E15
3.19
MCU CPU Register
3.2 123 Numbers on Display (not an
error)
If the fridge is off, and the operator views
numbers on the display, this is not an error
message. The ARP has detected an
overheat situation and is in a countdown
period until the ARP restarts the fridge. The
countdown period is the time until the ARP
attempts a safe restart of the refrigerator. For
example, if 056 is displayed on the screen, it
is 56 minutes
until the control will restart the
fridge, just keep the door of the fridge closed.
Do not turn off the ARP Control, please allow
the ARP to restart the fridge. By turning off
the ARP one prevents the ARP from doing its
job. If the ARP is turned off and then back on
the fridge will overheat again. See ARP User
Guide section ARP Protection Period
(What are the numbers on the display?) for
more information on the overheat event.
3.3 *Err (first dot on upper left)
In ARP Mode a single dot followed by Err
indicates that the ARP memory is cleared.
This can happen if the device has been Auto
Tuned incorrectly, or on rare occasions
surges/brown-outs less than minimum
voltage level of 10.5VDC or greater than
22VDC. Proceed to Restore ARP Defaults
section to reload default values.
3.4 OPn Boiler Sensor
This message will be flashed on the LED
display to warn the operator that there is an
error with the RTD and/or the RTD wiring.
The ARP is disabled because it cannot
function without the RTD. Thus, the cooling
unit is not protected by the ARP at this point;
the refrigerator operates just as it did when it
came from the manufacture. See 2.8 OPn
Process Value to clear the error after fixing
any issues or to use the recorded value for
diagnostics.
DANGER Operator must take action to
resolve the cause of the RTD error.
Possible causes of RTD error
:
a) RTD has failed OPEN. Test RTD
resistance with Ohm meter that has less than
0.3mA current for the Ohm test function. Use