ROAMiQ Dometic Vent Fan Integration Module: Fan-Tastic Vent wiring guide
Connect the ROAMiQ Dometic Vent Fan Integration Module to a Dometic Fan-Tastic Vent FA75 or FA95: plug in the two pigtails, join their signal wires, and connect red and black to the fan's 12V spade terminals.
The ROAMiQ Dometic Vent Fan Integration Module connects to the RV-C port on a Dometic Fan-Tastic Vent FA75 or FA95 roof fan. It is powered from the fan's own 12V supply. The module and the wiring are the same for both fans. The FA25 has no RV-C port and is not supported.
[CONFIRM: this diagram shows one finished harness; redraw it for the two pigtails in the box]
Before you start
- ROAMiQ Dometic Vent Fan Integration Module and its two pigtail harnesses
- Dometic Fan-Tastic Vent FA75 or FA95 roof fan
- Two inline connectors for the signal wires, and connections suited to the fan's 12V spade terminals
- Wire strippers and suitable insulated wiring materials
The harnesses
Two pigtail harnesses come in the box:
- A 4-pin pigtail that plugs into the module. It carries the RV-C signal (green and yellow) and the module's power (red and black).
- A 2-pin pigtail that plugs into the fan's RV-C port. It carries the RV-C signal only.
The fan's RV-C port has no power pins, so the module's red and black wires connect to the fan's 12V spade terminals instead.
| Pin | Wire | Function | Connects to |
|---|---|---|---|
| 1 | Green | RV-C CAN-L | One wire of the 2-pin pigtail |
| 2 | Yellow | RV-C CAN-H | The other wire of the 2-pin pigtail |
| 3 | Black | Ground (−) | Fan's ground (−) spade terminal |
| 4 | Red | +12V | Fan's +12V spade terminal |
Connect the module
Disconnect the 12V power
Pull the fan's fuse or disconnect the house battery so the fan cannot power on while you work.
Find the fan's connections
Behind the fan's interior trim, find the control board. Along its bottom edge are the white 2-pin RV-C port and the fan's 12V spade terminals.
Join the signal wires
Join the 4-pin pigtail's green wire to one wire of the 2-pin pigtail and its yellow wire to the other, with one inline connector each. Keep the two joins separate.
Connect the power wires
Connect the 4-pin pigtail's red wire to the fan's +12V spade terminal and its black wire to the fan's ground spade terminal, alongside the fan's own power wires. The module is powered from the fan's supply, so it needs no separate feed.
Plug in both pigtails
Plug the 2-pin pigtail into the fan's RV-C port and the 4-pin pigtail into the module. Each fits only one way; press them in until they seat fully.
Restore power and test
Check each connection once more, then restore the 12V power. Confirm the fan powers on and works normally from its own buttons. The module's light comes on; a blinking green light only means it has not joined your Wi-Fi yet.
Troubleshooting
The fan does not power on
Disconnect the 12V power and check the power connections at the spade terminals. Red goes to +12V and black to ground. Check that neither is loose or touching the other.
The module is on, but the fan does not respond to it
Swap the green and yellow joins between the two pigtails and test again. The 2-pin pigtail can be joined either way round, and a swap does no harm. If that doesn't help, disconnect the 12V power and reseat both pigtails. The module can only talk to the fan while the fan has power, so also confirm the fan runs from its own buttons.
The module's green light keeps blinking
The module is wired correctly but cannot join your Wi-Fi. Check that your Wi-Fi is on, has a 2.4 GHz network, and reaches the fan.
Can one module control two fans?
No. Each fan needs its own ROAMiQ Dometic Vent Fan Integration Module.
Which fans does this work with?
The Dometic Fan-Tastic Vent FA75 and FA95. Both use the same module and the same wiring. The FA25 has no RV-C port and is not supported.
Do I need a separate power feed for the module?
No. The red and black wires connect to the fan's own 12V spade terminals, so the module powers up and down with the fan.