419 W. Pike St., Jackson Center, OH 45334

Airstream Atlas E1 & Interstate 24 E1 & 19 E1 Touring Coach
Technical Service Bulletin #200 – Airstream and Volta E1 Package Updates
Date: 7/17/2024
TO: Airstream Dealer
PROBLEM:
It has come to our attention that in certain model year 2023-2025 Atlas E1, Interstate 24 E1 & Interstate
19 E1 touring coaches, the Volta System may fail to re-engage in the charging process, which could lead
to the battery pack completely discharging.
RANGE OF VEHICLES INVOLVED:
Model year 2023-2025 Atlas E1, Interstate 24 E1 & Interstate 19 E1 touring coaches built between:
March 8, 2022 – July 10, 2024
Serial Number Range: 307182-311984
Note: Because our VINs do not run in a contiguous series, there will be units in the VIN range that are not affected
by the technical service bulletin.

WARRANTY REIMBURSEMENT:
A notice of this technical service bulletin has been sent to affected retail owners. A copy of the Owner’s
Letter is included for your review. They may request that you complete the repair. If so, please follow the
warranty reimbursement procedure. If the unit and/or units are in your inventory, or if you are requested
to perform the repair for the retail customer, please complete the advised repair and send in a warranty
claim referencing this technical service bulletin number for reimbursement. The time allowed for the
repair is explained below.
SERVICE ACTION:
Step 1 - Atlas - Dual “Rib” rewire, Firefly software update and Soft Start installation. Use Operation
Code TCSBR8934079. 1.75 Hrs.
Step 2 - Interstate 24 and Interstate 19 – Dual “Rib” rewire and Firefly software update. Use Operation
Code TCSBR8933079. .75 Hrs.
Step 3 - Interstate 24, Interstate 19 & Atlas Volta firmware updates, upgraded touchscreen interface,
fuse replacement and AC detect timer harness installation. Use Operation Code TCSBR8935079. 1.50
Hrs. Note: The 1.50 labor time should be included only if Volta is not able to be onsite to complete the
updates. If Volta does complete their portion of the updates “onsite”, then the code should still be
entered, and no labor should be requested.
encl. – Owners Letter, Repair Procedure

Rick March
General Manager of Airstream Customer Service Group
Re: Technical Service Bulletin #200

Airstream & Volta E1 Package Update
Airstream is always seeking to improve and upgrade our products. It has come to our attention through customer
feedback that if the Volta System fails to invert power or re-engage in the charging process, in certain cases the
battery pack will completely discharge.
Airstream and Volta have been working hand in hand on an update that will prevent this battery issue from
occurring. A portion of the work must be completed by Airstream Dealer Service Techs, while other updates may
be completed by Volta technicians. Volta upgrades may be performed by an Airstream Dealer Service Tech with
permission from Volta. The dealer will be required to contact Volta directly for approval.
Volta’s updates include an upgraded touchscreen interface, Volta firmware update, AC detect timer harness, and
fuse replacement. Airstream will update Firefly software, rewire the distribution panel, and potentially install an air
conditioning soft start.
We are asking affected customers to schedule an appointment with their local Airstream dealer to have their unit
serviced. Ideally this work should be scheduled so that Volta and Airstream service techs can complete the work
simultaneously.

Safety Precautions:
•
•

•
•

WARNING: Before working on the Touring Coach, unplug the coach and ensure the Volta system is
powered down and the three 30-Amp breakers are in the OFF position.
Caution: The possibility of accidentally tripping the breaker still exists if the touring coach is plugged in
with the inverter turned ON. After wiring the Dual RIB box, the inverter must be turned OFF when
plugging the touring coach into a GFCI outlet.
NOTE: Updating the Firefly firmware will result in a full system cycle and the lights will go off for a short
period of time while the system updates. It is advised to have a flashlight to assist during this process.
NOTE: The air conditioner on an Atlas Touring Coach may not function correctly after updating the
Firefly firmware if the air conditioner does not have a soft-start installed. A soft-start will need to be
installed prior to testing the load shed.

Contact Airstream:
Questions or concerns? Airstream Owner Relations is available from 8:00 am to 6:00 pm EST at
support@airstream.com or 877-344-1076 ext. 7401.

Before You Begin:
•

Please read this document, in its entirety, before performing any actions.

Step 1 - Install Air Conditioner Soft Start (Atlas only, proceed to Step 2 otherwise):
1. Turn power off to the coach by unplugging the shore cord, verifying the inverter is in the off position, and
turning off the AC breaker. To turn off the breaker, locate the distribution box (breaker panel) within the
cabinets along the curbside wall. Flip the breaker labeled “A/C” to the "OFF" position.

2. Access the air conditioner on the roof and remove the four phillips screws with washers securing the AC
shroud. Remove and save the AC shroud and fasteners.
Note: If the AC is mounted on top of a unit, fall protection should be worn when working at a height of 4+ feet.

3. With the shroud removed, locate the fan and use a 10mm socket to remove the three nuts securing the
fan. Lift up on the fan to remove it from the threaded studs and set the fan off to the side.

4. Locate the electrical panel next to the compressor and remove the panel's cover using a 10mm socket.

5. The soft start box should be installed at least a 1/2" away from the AC coils and 1/2" away from the AC
compressor. Ensure that the wires exiting the soft start box are oriented away from the AC compressor.
Clean the area where the soft start box will be installed using denatured alchol to prep the surface. Adhere
the soft start box by removing the paper backing from the double-sided tape on the back/bottom of the
box.

6. Locate the Positive Temperature Coefficient Resistor (PTCR) and remove the female spade connector with
two red wires from the PTCR. Next, remove the PTCR from its spade connector and discard the PTCR.
Reconnect the female spade connector, with two red wires, to the now open male spade connector where
the PTCR was removed.

7. Locate the start capacitor on the side of the AC and cut the yellow and red wires (approximately 6" from
the top of the capacitor). Properly strip the red and yellow wire ends that are NOT connected to the
start capacitor. Affix blue 16-14 gauge butt connectors (or properly sized Wagos) to the ends of the red
and yellow wires. Locate the red and yellow wires coming from the installed soft start and ensure that
each wire is properly stripped. Connect the red wire from the soft start to the red wire from the start
capacitor and the yellow wire from the soft start to the yellow wire from the start capacitor.

8. Locate the black and white wires coming from the installed soft start box and route the wires through the
electrical panel opening next to the AC compressor. Connect the black wire to the open spade connector
labeled "PUR," in the electrical panel.

9. Locate the male spade connectors labeled "YEL" on the circuit board within the electrical panel. Remove
the thicker gauge white wire installed on one of the "YEL" spade connectors. Cut off the spade
connector from the thicker gauge white wire and properly strip the wire’s end. Install a blue 16-14 gauge
butt connector (or properly sized Wago) on the end of the white wire. Retrieve the routed white wire from
the soft start (routed into the electrical panel in the previous step) and connect the two white wires.

10. Ensure all wires outside of the electrical panel are laid flat on the base of the AC and are routed away from
the threaded studs where the fan will be reinstalled. Properly reinstall the cover over the electrical panel
using a 10mm socket. Using black cable ties, secure the wires together that are routed from the side of the
electrical panel around to the start capacitor (include any wires from the soft start).

11. Reinstall the fan over the threaded studs on the base of the AC in the same orientation in which it was
removed. Ensure all wires are clear of the fan and are not pinched under the fan's feet. Properly tighten
the fan nuts using a 10mm socket.

Note: Ensure that the fan sits flush on the base of the AC and that the soft start box does not impede the fan
installation. If needed, reposition the soft start box.
12. Locate the AC shroud and reinstall it so that the four mounting hole locations align. Properly tighten each
screw.

13. Inside the unit, locate the distribution box (breaker panel) and flip the AC breaker to the "ON" position.

14. Locate the Volta touchscreen display in the upper cabinet next to the entry door. Turn the inverter ON and
test that the air conditioner is functioning properly.

15. Repeate the testing process for the air conditioner using external AC power. Before plugging in, make sure
to turn the inverter OFF.

Step 2 - Perform Firefly Update:
Note: Click here to watch a video on how to update the Firefly firmware.
To update the Firefly firmware Logic to 7.27 (Interstates) or 7.19 (Atlas), complete the following steps:
1. Navigate to the Settings Menu by tapping the gear icon on the Firefly touchscreen. In the Settings, press
and hold on “Floorplan” (a pop-up message may be displayed and will need to be accepted to continue).
The proceeding page will display the preset options for that model. Take a picture of these settings to refer
back to them once the firmware update has been completed. Interstate models will have additional option
pages for Shades/Lights. Make sure to note these option settings as well.

2. Load the Firefly firmware files onto a freshly formatted FAT32, 8gb or smaller, USB drive. The firmware files
can be obtained by downloading from Airhub, or by contacting Airstream Customer Support at
support@airstream.com, or calling 877-344-1076 ext. 7401.
•

•

Firmware files will be available for both the 5” and 7” Firefly screens. The files will need to be loaded
onto separate USB’s or the drive will need to be reformatted prior to updating a different screen size
(both files cannot be loaded onto the same USB at the same time). It is also recommended that the
7” screen be updated before the 5” screens.
The files should be located on the root directory of the USB drive, inside a folder you create named:
spyderconfig

3. Drag and drop the files into the newly created spyderconfig folder.

4. Remove the main Firefly touchscreen from the wall by placing your fingers along the top of the screen and
applying pressure “down and out” to pop the screen out of the wall mount.

Note: Take care to not drop the touchscreen once it comes free from the wall mount.

5. Plug the flash drive, containing the firmware update files, into the USB port on the back of the touchscreen.
Then, unplug the network cable from the touchscreen for at least 5 seconds, then plug it back in.

Network Cable

6. Once the touchscreen boots back up, tap Manual Load.

7. Several updates may be required. Tap the first update to begin the installation process (even if it says “No
Update Required”). Once the status for the first update changes to “Update Successful”, repeat this
process for the remaining updates.

8. Once all configs have been updated successfully, tap Exit. Remove the flash drive from the screen and
perform another power cycle, by unplugging the network cable and waiting 5 seconds.
9. Check the update by verifying the Logic version on the SETTINGS page is now 7.27 (INT) or 7.19 (Atlas).

10. Once the Logic has been verified, 7.27 (INT) or 7.19 (Atlas), navigate back to the settings menu and press
and hold on “Floorplan.” Verify the options selected still match the picture that was taken. If any options do
not match, tap the screen to activate/disable.

11. Once complete, reinstall the touchscreen by applying pressure to the corners to “snap” it back into the wall
mount.

Step 3 - Rewire the RIB Relay:
Old Wiring:

New wiring:

RIB Rewiring:
1. Fully disconnect power to the coach by unplugging the shore power cord, ensuring the Volta system is
powered down, and placing the three 30-amp breakers in the OFF position.

2. Remove the cover on the distribution panel to gain access to the screws securing the breaker box in place.
• For Atlas Models: Remove the Power Center, and the drawer above it, for easier access.
• For Interstate Models: Remove the ottoman seat cushion.

3. Indentify which version of RIB wiring the coach has. The coach should have a RIB box wired in 1 of 3 ways.
Once you have identified the wiring type, proceed to the corresponding instructions.

Colored Cable RIB

Blue Cable RIB

True Dual Cable RIB

Colored Cable RIB:
1. Disconnect all wires from the dual RIB cable.
2. Using the existing Wago, connect the White wire to the Black wire from the AC power monitor.
3. Connect the Red wire to the “MAIN” breaker Wago.
4. Connect the Blue wire to the “SHORE” breaker Wago.
5. Connect Green wire to the shore neutral bar.
6. Cap off any remaining wires.

MAIN

SHORE

AC Power Monitor

Shore Neutral Bar

Cap
Cap

Blue Cable RIB:
1. Disconnect all the wires from the dual RIB cable.
2. Using the existing Wago, connect the Blue 1 wire to the Black wire from the AC power monitor.
3. Connect the Blue 4 wire to the “MAIN” breaker Wago.
4. Connect the Yellow/Green wire to the “SHORE” breaker Wago.
5. Connect the Blue 5 wire to the shore neutral bar.
6. Cap off any remaining wires.

Shore Neutral Bar

Cap
Cap
SHORE
MAIN
AC Power Monitor

True Dual RIB:
1. Disconnect all the wires from the dual RIB cable except for the Blue and Purple wires, which are connected
together.
2. Using the existing Wago, connect the Yellow wire to the Black wire from the AC power monitor.
3. Disconnect the Brown wire to the “MAIN” breaker Wago.
4. Connect the White/Red wire to the “SHORE” breaker Wago.
5. Connect the White/Purple wire to the shore neutral bar.
6. Cap off any remaining wires.

SHORE

Shore Neutral Bar

MAIN

Leave as is

Cap
Cap

AC Power Monitor

Airstream AC Detect Updates
Overview
This document outlines the process for implementing the AC detect solution for the Volta Power Distribution
Hub inside an Airstream coach. This solution involves connecting an adaptor harness to the Power Distribution
Hub, touchscreen replacement, pack firmware updates, and 100A internal PDH fuse replaced with 175A fuse.
It is recommended that the Pack firmware is updated before the touchscreen is replaced. All other steps can be
done in any order.

Safety
Warnings
Warning: Careless handling of electrical components can be fatal. Never touch or use electrical
components or appliances while feet are bare, while hands are wet, while standing in water, or
while on wet ground.
Warning: Components and devices in Volta Systems shall not be opened or modified. Only
Volta technicians or trained professionals with in- depth knowledge of Volta Systems should
perform service work on a Volta system. Any attempt to service a system by unapproved
personnel may cause damage to the system, voiding of the warranty, injury, or harm.
Safety Guidelines
Power Down Safely: Before initiating any work on the system, ensure that the system is powered
down safely and that all power sources are disconnected. Perform lockout and tagout
procedures to ensure systems are not powered on while being serviced.
Assistance: If you are unsure about any aspect of the procedure or if you encounter difficulties
during the process, seek assistance from a qualified technician or contact Volta customer
support for guidance.
Secure Connections: Double-check all connections to ensure they are securely fastened and
properly seated. Loose connections may lead to operational issues or malfunctions.

•

•

•

Contact Volta:
Questions or concerns? Volta phone support is available during business hours at 616.226.4222

Before You Begin:
•
•

Please read this document in its entirety before performing any actions.
If you are not comfortable performing any of the actions included in this document, please
contact Volta Power Systems.

Tools Required:
To perform these instructions, you need basic hand tools, such as screw drivers and wrenches. The tools required
may vary by vehicle.

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Airstream AC Detect Updates
AC Detect Timer Harness Installation
The AC Detect Timer harness is labeled to indicate the appropriate connection points.

Timer Harness Installation

Figure 1. The AC Detect Timer Harness. Note: The appearance and
availability of all components of the harness may vary from what is
shown.

1.
2.
3.

Follow the instructions provided by your OEM/Upfitter to access the Power Distribution Hub
(PDH).
Once you have access to the PDH, ensure the Volta System is powered off and the vehicle is off.
Twist the connector ring counterclockwise to disconnect the 23-pin communication connector
from the Power Distribution Hub. See Figure 2 below.

Figure 2. Rotate connector ring counterclockwise to remove from hub.

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Airstream AC Detect Updates
4. Locate the male end of the AC Detect Timer harness, labeled “PDH.” See Figure 3 below.

Figure 3. Male end of AC Detect Timer Harness

5.

Rotate the connector from the Timer harness until they are mated and then rotate the connector
ring clockwise to tighten the connection. You should hear a click when seated properly. See
Figure 4 below.

Figure 4. Once connector body is properly aligned, rotate connector ring clockwise to secure to PDH.

6.

Using the same connection method as before, connect the 23-pin connector attached the coach’s
main system harness into the female end of the AC Detect Timer Harness labeled “Trunk.” Check
to ensure connector rings are properly seated and are not loose. The finished installation is shown
in Figure 5 below.

Figure 5. Finished installation of AC detect harness

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Airstream AC Detect Updates
Volta Touchscreen Service Instructions
Estimated Repair Time:
0.5 hours

Instructions:
OPTION A) REPROGRAM THE EXISTING TOUCHSCREEN WITH VOLTA SUPPLIED PROGRAMMER
Perform the following instructions to connect a supplied programming tool to a port on the back of the Volta
Touchscreen.

1.
2.
3.
4.

Disconnect your vehicle from shore power.
Turn off the vehicle.
Turn off the Volta System. Ensure the touchscreen is off and the LED on the pushbutton is off.
Gain access to the rear of the Volta display. This varies based on the model. Please find
location of display and necessary steps to access USB port in table below.

5.

Locate the USB port (refer to G on figure 6) on the back of the touchscreen. Remove the port’s
cap by rotating it counter-clockwise. The correct port is identified by a “USB” symbol and will
be the top cap.
Ensure the switch (J in figure 8) on the programming tool (K in figure 8) is in the “O” position.

6.

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Airstream AC Detect Updates

Top

G
G:

USB Port and Cap

3.0
Figure 6. Back side of touchscreen/ display.

7.

Connect the attached cable (L in figure 8) on the programming tool to the port on the
touchscreen. The orientation of the connections must be exact. Pay close attention to the
prongs and key on the connections. Refer to the port diagram and the connector (figure 7). Do
not force the connection. When the connections are engaged in the proper orientation, twist
to tighten.

Figure 7. Port diagram and connector cable. Note locating notch which ensures proper alignment.

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Airstream AC Detect Updates
5.0

H

I

J

L

K

H:

Upper LED

I:

Lower LED

J:

On/Off Switch

K:

Programming Tool

L:

Attached Cable

Figure 8. Volta supplied programming tool.

8. Perform programming steps (refer to figure 8):
a. Flip the switch on the programming tool to the “|” position.
b. Monitor the (2) LEDs (H and I) on the programming tool. After a few seconds, and when
the upper LED (H) is solid green and the lower LED (I) is flashing green, the system
checks are successful. Proceed to the next step.
c.

Turn on the Volta System using the pushbutton.

d. After approximately 90 seconds, a “Download Mode” message and a progress bar
appears on the touchscreen. If the “Download Mode” message does not appear after
approximately three minutes, a “Download Failed!” message appears, or if the bottom
LED on the programming tool turns off, you must restart the programming process. To
restart, turn off the Volta System, switch off the programming tool, then return to step
7-a.
e.

Do not turn off or disconnect the Volta System or the programming tool during
Download Mode. Programming may take up to 10 minutes.

f.

“Download Complete” appears on the touchscreen when the programming process is
complete.

g. Turn off the Volta System.
h. Switch off the programming tool.

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i.

Disconnect the programming tool from the touchscreen and replace the cap on the
touchscreen port.

j.

Programming is now complete.

9. Disconnect the programmer and reassemble any components.
10. Turn on Volta system and confirm new (3.01) firmware has been successfully installed by