GARNET SEELEVEL II Holding Tank Monitors User Manual

: September 16, 2024
: GARNET

Table of Contents

SEELEVEL II Holding Tank Monitors
Product Information
Specifications
Product Usage Instructions
Safety Information
Installation Information
Q: What should I do if I encounter difficulties during
Q: How can I ensure accurate level measurements with the tank

SEELEVEL II Holding Tank Monitors

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Product Information

Specifications

The SeeLeveL IITM tank monitor series is designed to provide
accurate level measurement technology for the recreational vehicle
industry.

Model: SeeLeveL II 709-BTP7
Manufacturer: Garnet Instruments Ltd.
Country of Origin: Canada, USA
Display Manual Version: 709-BTP7 Display Manual_v1.0 –
10-Jul-2024

Product Usage Instructions

Safety Information

Before installing, operating, servicing, or maintaining the tank
monitor, carefully read the user manual and familiarize yourself
with the equipment.

Safety Symbols:

NOTE: Provides additional information for procedures.
CAUTION: Explains safety information that could lead to product
damage or data loss.
WARNING: Explains potential dangers that could result in
personal injury or death.

Installation Information

Refer to the installation documentation downloads for detailed
instructions on how to install the display. Ensure you have the
necessary tools and equipment before starting the installation
process.

Tools and Equipment Required

Screwdriver
Mounting Template
Wiring Kit

Display Installation

Follow these steps to install the display:

Use the provided Display Panel Mounting Template to position
the display correctly.
Connect the wiring to the display following the wiring
instructions in the user manual.

FAQ (Frequently Asked Questions)

Q: What should I do if I encounter difficulties during

installation?

A: If you face challenges during installation, refer to the
troubleshooting section in the user manual or contact Garnet
Instruments customer support for assistance.

Q: How can I ensure accurate level measurements with the tank

monitor?

A: To maintain accurate readings, regularly calibrate the tank
monitor according to the calibration instructions provided in the
user manual.

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HOLDING TANK MONITORS

INTRODUCTION
Through decades of experience and development the SeeLeveL IITM tank monitor series has established itself as the gold standard in level measurement technology for the recreational vehicle industry.
The SeeLeveL IITM 709-BTP7 builds on previous experience to offer an exceptional combination of features, accuracy, and reliability, ensuring an excellent user experience. It provides monitoring of up to 7 tanks, including 2 FRESH, 2 BLACK, and 3 GREY water tank levels. With Bluetooth capability and the latest SeeLeveL RV 2.0 app, you can view real-time percentage readouts and receive alerts when tank levels are too high or too low. The 709-BTP7 monitors battery voltage and includes a pump switch for added convenience. In addition, the system can display the operating characteristics of each of the tank sending units, giving it unsurpassed diagnostic capability.

USER MANUAL 709-BTP7

CANADA

USA

Garnet Instruments Ltd.

Garnet US Inc.

286 Kaska Road

5360 Old Granbury Road

Sherwood Park, AB T8A 4G7 Granbury, TX 76049
SeeLeveL II 709-BTP7 Display Manual (DRAFT)

2024 Garnet Instruments Ltd. All rights reserved. No part of this publication may be reproduced, Transmitted, transcribed, stored in a retrieval system or translated into any language in any form by any means without the prior written consent of Garnet Instruments. Information in this manual is subject to change without notice and does not represent a commitment on the part of GARNET.
709-BTP7 Display Manual_v1.0 – 10-Jul-2024
Page 1

TABLE OF CONTENTS
Select from contents list below to go to that page.
INTRODUCTION ………………………………………………………………………………………………………… 1
SAFETY INFORMATION ……………………………………………………………………………………………. 2
ABOUT THE SYSTEM ………………………………………………………………………………………………… 3 Model and Serial Number Info…………………………………………………………………………………… 4
INSTALLATION INFORMATION ……………………………………………………………………………….. 4 Installation Documentation Downloads …………………………………………………………………… 4 Tools and Equipment to Install Display…………………………………………………………………….. 4
DISPLAY INSTALLATION…………………………………………………………………………………………… 5 Display Panel Mounting Template …………………………………………………………………………….. 5 Connect Wiring to the Display …………………………………………………………………………………… 5
OPERATION GUIDE…………………………………………………………………………………………………… 6 To Read a Tank Level…………………………………………………………………………………………………….. 6 To Read the Battery Voltage ……………………………………………………………………………………….. 6 To Read the LPG Tank Level ………………………………………………………………………………………… 7
CONFIGURATION GUIDE …………………………………………………………………………………………. 7 Set the LED Brightness…………………………………………………………………………………………………. 7 Program the Number of Senders ………………………………………………………………………………. 8 Calibrate the LPG Sender…………………………………………………………………………………………….. 8 Program Alarm Set Points for Each Tank ………………………………………………………………….. 9 Program the Display as Primary or Secondary……………………………………………………….10 Enable/Disable the LPG Sender…………………………………………………………………………………10
TROUBLESHOOTING GUIDE……………………………………………………………………………………. 11 Error Codes……………………………………………………………………………………………………………………11 Sender Diagnostics ……………………………………………………………………………………………………..11 Wiring Diagnostics ………………………………………………………………………………………………………12 Troubleshooting & Installation Tips …………………………………………………………………………14
SPECIFICATIONS & CERTIFICATIONS …………………………………………………………………….. 16
WARRANTY & SERVICE INFORMATION………………………………………………………………….17

SAFETY INFORMATION
Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service, or maintain it. The following special messages may appear throughout this manual or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure. “Notes”, “Cautions”, and “Warnings” have been used to bring special matters to the immediate attention of the reader.
Safety Symbols
W NOTE: expands on information for any procedures.
W CAUTION: explains safety information that could cause damage to the product, including data loss.
W WARNING: explains dangers that might result in personal injury or death.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
Pump and Heater Switch Safety Precaution
W WARNING: All power circuits must be fused. A fuse is not provided with the system it is the installer’s responsibility to install a fuse with the maximum rating your model requires. A relay may be required for models with a pump or heater switch. For information about the requirements for your model please refer to the Specifications document located on our website. For more detailed information please refer to the chapter entitled TROUBLESHOOTING GUIDE”, section “How to avoid damaging the display or pump switch due to excessive current”.

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ABOUT THE SYSTEM

The Senders
Each sender panel is a flexible self-adhesive printed circuit board which is adhered to the side of the holding tank. The sender panel can be cut to length to match the height of the tank, and auto calibrates so that it can read from Empty to Full regardless of the height of the tank.
In addition to the level, the sender also transmits diagnostic information about its operation. This information can be used to determine if there is buildup of sludge on the inside of the tank, or to determine if the sender is damaged or delaminating from the side of the tank. If sludge buildup in the tank becomes extreme the gauge will cease to operate properly, by monitoring the signal power the tank can be cleaned before the buildup gets excessive.
Multiple senders are available with the ability to double stack the senders to provide accurate level measurement for tank heights ranging from 3.5″ to 34″. (See Sender Installation guide for available sender options-link on page 4)
The Display
The display receives the information from sender panels via a single 2 conductor wire and shows the level information in percent of full on a 3-digit LED display, from 0% to 100%. When the button for a particular tank is pressed, the display shows the level for that tank.
Battery Voltage
The system also shows the RV battery voltage by measuring the voltage which powers the display. The voltage is shown with a resolution of 0.1 volt.

Diagnostics
If a sender is operating properly and connected to the display with good wiring, then the display will show the level normally. If the wiring is disconnected, shorted, cut, or if the sender panel is defective, then the display will indicate an error code. The various error codes are shown in the section entitled “TROUBLESHOOTING GUIDE”.
With these diagnostic features and the digital nature of the tank level sensing technology, it is almost impossible for the system to indicate an incorrect level. In the very unlikely event there is an error, servicing is greatly aided with the diagnostic information.
Bluetooth®
The display has Bluetooth® wireless technology, which allows you to check your tank levels, battery voltage, and LPG tank levels on any compatible smartphone or tablet device with a free downloadable app available on Google Play and iOS app stores. (See separate manual for app installation and operation-link on page 4)
Alarm Output
The single common alarm output can be programmed to indicate a high or low sewage level, a high or low water level, or a high or low LPG level. More than one alarm can be assigned to the alarm output. This output can be connected to an indicator light and used to show a high sewer level and/or a low water level, alerting the user that attention is required. It could also be used to prevent toilet use if the black tank is full

LPG
The display can use an existing LPG electrical sender to show the LPG level. It can be automatically calibrated to any sender and shows the level information in percent of full on a 3-digit LED display, from 0% to 100%.

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Page 3

Model and Serial Number Info
Before installing your system, look for the model and serial number on the back of the display, as shown below. Write these numbers below for future reference.
Document the following information for future reference. Model Number: ___ Serial Number: ____ Date of purchase:

SeeLeveL II 709-BTP7 Display Manual (DRAFT)

INSTALLATION INFORMATION
The installation for the complete system consists of mounting the display inside the RV, cutting, and mounting the senders to the sides of the tanks, connecting the wiring, and programming the display.
This manual provides information for the 709-BTP7 display which differs from other models due to the additional ALT button and red LED light. This button is needed for viewing and configuring secondary tanks. It is important to follow operation and configuration procedures for this model.
Installation Documentation Downloads
Other documentation will be required to complete installation for your specific model. Get them from our website Resource Library either by selecting the link below or scan the QR code and search for your model.
garnetinstruments.com/holding-tanks-resource-library/
· Sender Installation Manual · Wiring diagram · SeeLeveL RV 2.0 App manual
RESOURCE LIBRARY
Tools and Equipment to Install Display
screwdriver or power driver wire cutters/stripper wire crimper electrical tape butt connectors saw to cut a hole for display (if required)
Optional items available to purchase if required. Go to our website for more information:
Filler Panel to fit previous display hole that is too large. Gasket to prevent the display monitor from shorting if mounting to a
metal surface.
Page 4

DISPLAY INSTALLATION

The installation consists of mounting the display inside the RV, cutting and fastening the senders to the sides of the holding tanks, connecting the wiring, and programming the display. When wiring DO NOT use spade connectors to join wires, only use crimp-on butt connectors or solder the wires together.

Display Panel Mounting Template
Mount the display by cutting a hole in the wall with the given dimensions plus four screw holes. The thickness of the RV wall needs to be thick enough to retain the screws. The panel will be mounted onto the wall using the four included #4 screws, or different screws as required. The cutout diagram below is actual size and can be used as a template. The depth of each model varies 1″ – 1 3/8″ (25 – 35 mm), model dependent.

Connect Wiring to the Display
It is easier to connect the wiring to the display connector first, and then plug the connector into the display panel. Refer to the wiring diagram for your model from our Resource Library using the link or QR code on page 4.
The senders need to be grounded to a single ground wire from the display. Make sure that the system ground is connected to the breaker panel ground.

Display pigtail connector

W CAUTION: If mounting the display in a metal panel or wall there is a risk the display can short circuit causing permanent damage. Non-conductive mounting spacers are available to purchase to help prevent damaging the display. Contact Garnet or go to our website for further details. More installation tips are available in the “Troubleshooting and Installation Tips” section.
SeeLeveL II 709-BTP7 Display Manual (DRAFT)

W WARNING: All power circuits must be fused. A fuse is not provided with the system it is the installer’s responsibility to install a fuse with the maximum rating your model requires. A relay may be required for models with a pump or heater switch. For information about the requirements for your model please refer to the specifications page and wiring diagram.
Page 5

OPERATION GUIDE

The display is the only system component that is accessed by the user. All user input to the display is done using the buttons along the bottom of the display.

To Read a Tank Level

1. Press and release the corresponding tank button to display the tank level. LED display shows the level in percent.
2. Display shuts off after 5 seconds.
3. To read the secondary Fresh/Grey/Black tanks, press and release ALT then press the button for the corresponding tank. The LED display will show the level and the ALT light will be on.

FRESH or GREY or BLACK
78
LEVEL IN PERCENT
LEVEL IN PERCENT
ALT
FRESH or GREY or BLACK

4. To view the 3rd grey tank (galley), press and release ALT, and then press LPG.

ALT + LPG

5. Additionally, the screen will briefly flash “Fr1” or “Fr2” before showing the level, to differentiate between the two fresh tank, or “Gr1”, “Gr2″, Gr3” for the three grey tanks, and “bL1” or “bL2” for the two black tanks.
6. To continuously display a reading, press and release the desired button twice. For secondary tanks, ALT must be pressed and released first.
7. Continuous display mode is indicated by a decimal point on the right hand side. The level is updated once per second. User can watch the level change while the tank is being filled or drained.
8. Continuous display mode shuts off after 5 minutes. To end the hold mode sooner, press any tank button and display will shut off.

Fr1
LEVEL IN PERCENT
Gr1
LEVEL IN PERCENT
BL1
LEVEL IN PERCENT

FR2
LEVEL IN PERCENT
GR2 GR3
LEVEL IN PERCENT LEVEL IN PERCENT
BL2
LEVEL IN PERCENT

+ FRESH

FRESH

7 .8
LEVEL IN PERCENT

FRESH

=
LEVEL IN PERCENT

SeeLeveL II 709-BTP7 Display Manual (DRAFT)

To Read the Battery Voltage
1. Press and release the BATT button to display the battery voltage. LED display shows the battery level in volts.
2. The display shuts off after 5 seconds.
3. To continuously display reading, press and release the BATT button twice.

BATT

1 .2 0
LEVEL IN PERCENT

LEVEL IN PERCENT

+ BATT

BATT

4. The reading may flicker back and forth between two values, for example, 12.6 and 12.7 volts. This is normal behavior for a digital voltage display.
5. To read a tank level or LPG level, the corresponding button can be pressed at any time. The 5 second timeout is restarted every time a button is pressed.

1 .2 6 1 .2 7

LEVEL IN PERCENT

GREY
or
LPG

23
LEVEL IN PERCENT
56
LEVEL IN PERCENT

To disable or enable Always On Display (AOD):
1. Enter programming mode by pressing and holding BATT and ALT, after a few seconds, the display will briefly flash “SEt”, indicating you are in the settings menu.

BATT + ALT

Hold

SEt
LEVEL IN PERCENT

2. To scroll through options, press BLACK to move upwards and FRESH to move downwards until the display indicates ‘Aod’ for always-on display.

BLACK FRESH

AoD
LEVEL IN PERCENT

3. Press ALT and select between “On” and

“OFF” using the BLACK and FRESH

buttons, and make your selection.

ALT

4. Press the BATT button to save and exit the programming mode.
a. If you choose “On” then the battery voltage is continuously displayed very dimly to save power until the setting is disabled.

BLACK FRESH

ON
LEVEL IN PERCENT
OFF
LEVEL IN PERCENT

1 .2 0
LEVEL IN PERCENT

BATT

Page 6

To Read the LPG Tank Level

1. Press and release the LPG button to display the LPG level in percent.
2. The display shuts off after 5 seconds.
3. Press and release the LPG again, to display a new reading. The 5 second timer will be restarted.
4. To hold the LPG level on the screen, press, press LPG twice. Continuous display mode is indicated by a decimal point on the right hand side.
5. The display will shut off 5 minutes after the button is released.
6. To read another tank level or battery voltage, the corresponding button can be pressed at any time. The 5 second timeout is restarted every time a button is pressed.

LPG

56
LEVEL IN PERCENT

LEVEL IN PERCENT
+ LPG

LPG + LPG

5 .6

LEVEL IN PERCENT

+ GREY

78

LEVEL IN PERCENT

or BATT 1 .2 0

LEVEL IN PERCENT

CONFIGURATION GUIDE

Set the LED Brightness

The LED brightness can be adjusted to suit the user and the operational circumstances. If it is to be used in the service bay area where sunlight can reach it, the LED brightness should be high.

1. To program the LED brightness, enter the brightness programming mode. To do this, press and hold down BATT and ALT. After a few seconds the display will briefly flash “SEt” indicating you are in the settings menu.

BATT + ALT

Hold

SEt
LEVEL IN PERCENT

2. Scroll through options, press BLACK to move upwards and FRESH to move downwards until the display indicates “bri” for brightness.

BLACK FRESH

bri
LEVEL IN PERCENT

3. Press ALT again, and using the FRESH and BLACK buttons, select a value between 0 and 9. The current brightness level is displayed. b-0 is the minimum brightness and b-9 is the maximum brightness.
4. Press the BATT button to save and exit the programming mode.

BLACK
ALT
FRESH

b-0
LEVEL IN PERCENT
b-9
LEVEL IN PERCENT

BATT

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Program the Number of Senders

To program the number of senders for each tank, the display needs to enter the sender programming mode. By default each tank is set for single sender application. This should only be done at the time of installation; there is no reason to change the number of senders afterward. Make sure that the number of senders programmed into the display matches with the number of senders connected; otherwise the display will show an error.

1. To configure the number of senders for a tank, hold down BATT and the button for the
tank to be programmed.

+ BATT

FRESH

Hold Hold

2. After a few seconds, the screen will briefly display the name of the tank that you are
entering tank setup for, (i.e “Fr1” for fresh 1), and then you are in the programming mode
for that tank.

fr1
LEVEL IN PERCENT

3. Use FRESH and BLACK to scroll up and down through the menu until “SEn” for senders is

BLACK

displayed. Press ALT to select.

FRESH

sEn+
LEVEL IN PERCENT

ALT

4. Select the number of senders between 0 and 2 using the FRESH and BLACK buttons. Setting it to 0 disables that tank reading. “1SE” indicates a single sender. “2SE” indicates a stacked pair of senders. Press BATT to save the setting.

BLACK FRESH

The screen will briefly show “sto” to indicate that the setting is being stored.

15E
LEVEL IN PERCENT
1 Sender
25E
LEVEL IN PERCENT
2 Senders

5. To configure the number of senders for a secondary tank, instead of holding BATT and the corresponding tank button, press and hold ALT and the corresponding tank button.
6. To access the setting for the third grey tank (galley), hold ALT and then hold LPG.

sto
LEVEL IN PERCENT

+ ALT

FRESH

Hold Hold

+ ALT

LPG

Hold Hold

Calibrate the LPG Sender
The LPG tank must be full when the sender is calibrated, otherwise the calibration will be invalid. Fill the LPG tank by using an alternate measurement method, such as weight, a spit valve, or a mechanical gauge on the tank.

1. To calibrate, hold both BATT and LPG buttons.
2. It will display “LPG” briefly to let you know you are in LPG programming mode.
3. Use FRESH and BLACK to scroll up and down through the menu until “CAL” for calibration is displayed.
4. Press ALT to calibrate. It will flash “cLP” to let you know a calibration is in process, and then “ok” to let you know it is done.
5. Press the BATT button to save and exit the programming mode.

BATT

LPG

Hold Hold

56
LEVEL IN PERCENT

BATT

LPG

Hold Hold

LPG
LEVEL IN PERCENT

BLACK FRESH

CAL
LEVEL IN PERCENT

cLP

ALT

LEVEL IN PERCENT

OK

LEVEL IN PERCENT

BATT

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Page 8

Program Alarm Set Points for Each Tank

To program the alarm point for each tank, the display needs to enter the alarm programming mode.

1. To set an alarm for a tank, hold down BATT and the button for the tank to be programmed.

+ BATT

FRESH

Hold Hold

2. After a few seconds, the screen will briefly display the name of the tank that you are
entering tank setup for, (i.e “Fr1” for fresh 1), and then you are in the setup menu for that
tank.

fr1
LEVEL IN PERCENT

3. Use FRESH and BLACK to scroll up and down through the menu until “ALr” for alarm is displayed. Press ALT to enter the sub-menu.

FRESH BLACK

ALR+
LEVEL IN PERCENT

ALT

4. The LED will display a symbol representing above (“n”) on the left, and a number on the right. This means the alarm will trigger above the programmed threshold
W NOTE: The example on the right represents a warning alarm that will trigger above 90%.

n90
LEVEL IN PERCENT

5. Press and hold FRESH to change between above or below setting. Above the threshold is represented by the “n” symbol, below the threshold is represented by the “u” symbol.
W NOTE: The example on the right represents a warning alarms that will trigger above 90% for one tank and below 10% for another tank.

FRESH
Hold

n90 u10
LEVEL IN PERCENT LEVEL IN PERCENT
Above Below

6. Use FRESH and BLACK to increase or decrease the alarm level, shown in percent. Setting alarm threshold to 0 disables it. Press BATT to save and exit.
W NOTE: The example on the right represents a warning alarm that will trigger below 10%.

BLACK FRESH

u10
LEVEL IN PERCENT

7. Press and hold BLACK to change between the shut down and warning alarm. The same above/below symbols are used, but the shut down alarm is represented by the symbol being in the top half of the digit, and warning symbol in the bottom half of the digit.
· Two alarm set points are possible for each tank, tied to the same output. Most cases will only need 1 alarm.
· An active alarm connects the orange wire to ground. It is suitable for small loads like LEDs or relay coils (max 750mA).

BLACK

Hold

n1
LEVEL IN PERCENT
u1
LEVEL IN PERCENT
Warning

n u

1
LEVEL IN PERCENT
1
LEVEL IN PERCENT
Shut off

W NOTE: All alarms are tied to the single common alarm output. Additional alarms are possible with the external alarm module.
Unless external alarm module is used the warn and shutdown will behave the same.

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Program the Display as Primary or Secondary
This setting should normally only need to be done when installing the display. An optional second display can be added to the system. This allows for a display in the service bay and one inside the coach. To avoid reading errors when using dual displays, one display needs to be set to secondary mode. A display in secondary mode monitors the primary displays sender requests and will scan the tank levels at a much slower rate if the primary display is disconnected. The alarms are inactive on the secondary display. All displays are primary by default.

1. Hold both BATT and LPG buttons. After a few
seconds the display will briefly flash “SEt”, indicating you are in the settings menu.

BATT + LPG

Hold

SEt

2. Use the BLACK to move up and FRESH to move down until the display reads “SEc” .

BLACK FRESH

LEVEL IN PERCENT
SEc
LEVEL IN PERCENT

3. Press ALT to enter the menu. Choose between “On” and “OFF” using the FRESH and BLACK buttons, and make your selection.
On = Secondary mode Off = Primary mode (default)
4. Press the BATT button to save and exit the programming mode.

+ ALT

ON
LEVEL IN PERCENT
OFF
LEVEL IN PERCENT

BATT

Enable/Disable the LPG Sender
1. Hold both BATT and LPG buttons. Screen will flash “LPG” indicating you are in the LPG settings menu.
2. Use the BLACK to move up and FRESH to move down until the display reads “En” .
3. Press ALT to enter the menu. Choose between “On” and “OFF” using the FRESH and BLACK buttons, and make your selection.
4. Press the BATT button to save and exit the programming mode.

BATT + LPG

Hold

SEt
LEVEL IN PERCENT

BLACK FRESH

En
LEVEL IN PERCENT

+ ALT

ON
LEVEL IN PERCENT
OFF
LEVEL IN PERCENT

BATT

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Page 10

TROUBLESHOOTING GUIDE

Error Codes
If a sender or its wiring is not operating properly, the following codes are shown on the display:

DISPLAY CODE
Open circuit
OPn
LEVEL IN PERCENT
Short circuit
sht
LEVEL IN PERCENT
Error
crc
LEVEL IN PERCENT

POSSIBLE CAUSE
1. If a sender is unresponsive.
2. There is an open circuit in the wiring so the sender is not connected.
Blue communication wire from senders to display is shorted to ground.
Indicates signal corruption between the sender and display due to bad wiring, bad senders, or multiple senders programmed the same.

SOLUTION
See Wiring Diagnostics flowchart on page 14.
Check all the senders to make sure they are programmed correctly. If they are, replace the sender that is creating the error.

Stacked senders
StA
LEVEL IN PERCENT

The display has been programmed for a single sender where stacked senders have been connected.

Change the senders or reprogram the display as required.

No top sender
ntP
LEVEL IN PERCENT
No bottom sender
nbo
LEVEL IN PERCENT
Calibration failure
CAL
LEVEL IN PERCENT
For LPG only
OPn
LEVEL IN PERCENT

The display has been programmed for double-stacked senders and one of these error codes are showing:
· ntP – only the bottom sender is reporting
· nbo – only the top sender is reporting

Correct the programming on the sender.

The memory used to store programming for battery voltage calibration value and tank sender signal values has failed.

Replace the display.

The only LPG diagnostic code is the open circuit. If the wiring to the LPG sender is shorted then the LPG will always show “0”.

W NOTE: There are no diagnostics for battery voltage.
SeeLeveL II 709-BTP7 Display Manual (DRAFT)

Sender Diagnostics
These diagnostics can be used to check the senders:
Reviewing Sender Diagnostics
The sender diagnostics can be reviewed periodically to check for any degradation of the tank senders. If a sender appears to be malfunctioning, reviewing the diagnostics should be the first step in the troubleshooting process. There are two diagnostics for the senders:
Sender signal power is an indication of how much signal is being transmitted through the tank wall and picked up by the receive part of the sender. Sender height is the number of receive segments present in the sender.

PROBLEM
If the signal power is too low.
The number of segments on the sender reporting is less than the amount of segments on the sender.

POSSIBLE CAUSE
It can indicate a sender which is detached from the tank, excessive buildup on the inside of the tank, bad wiring to the sender, low battery voltage, or a defective sender.
W NOTE: Typical signal power should be 50% to 60%. The minimum signal power for proper operation is 20%. P00 is 100%
One or more segments are not reporting. Either cut sender to a shorter length or replace the sender.
W NOTE: The senders always auto calibrate to the length that they are cut, so this diagnostic allows the user to confirm the length and to make sure that the auto calibration is working properly.

Check Signal Power Diagnostics
1. Press and hold the button for the tank to be checked until it displays the senders signal strength
2. This is indicated by a “P” showing on the left digit, for example “P26” indicates a 26% signal power. “P00” is 100%.
3. After 5 seconds of showing the signal strength, the display will shut off.

FRESH
Hold
P26
LEVEL IN PERCENT
LEVEL IN PERCENT
Page 11