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04-14-2023, 07:52 AM
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#1
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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replacing my rear A/C
Trying to get ahead of this before the new ac arrives. I am not sure if I am fortunate that the same Penguin unit is still available or not, but I bought it anyways. So I am trying to figure out what mods were made by FR. I see the module screwed into the front plastic shroud that looks like the interface to the inside control panel (circled in red). When I first got the coach the ac would freeze up so I installed the freeze sensor (circled in yellow) and purchased a new one for the new install. So what else do I need to address?
Notes -
Look for DIP switch settings
Look for ambient temp sensor
Use Dicor on AC mounts
Seal any holes gaps
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04-17-2023, 01:07 PM
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#2
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Diesel Rep West Coast
Join Date: Apr 2020
Posts: 457
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what year is your coach? my guess is it has Dometic AC units on it as the box circled in red looks like a analog to digital convert that was used as the Dometic A/C could not operate with a digital signal. Try Precision Circuits, as they supplied the digital to analog boxes.
https://www.precisioncircuitsinc.com...hvac-module-2/
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04-17-2023, 01:28 PM
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#3
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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Eric - the 34QS is a 2019 but actually built in late 2018. According to Dometic, the AC's were manufactured in 2017.
I'll reach out to Precision. Thanks!
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04-17-2023, 04:27 PM
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#4
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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Replacement arrived
The new AC came today and it's missing a part? Not sure if this is a Dometic part (support closed now) or a Berkshire part? Looks like the new pigtail would plug into this box. Is this also a swap over item?
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04-18-2023, 07:44 AM
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#5
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Commercial Member
Join Date: Nov 2019
Location: Lakeville, IN
Posts: 689
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What is missing is the D/A converter box that Eric mentioned further up the thread. Contacting Precision Circuits would be your best bet as they were the OE supplier of the D/A box
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04-19-2023, 11:27 AM
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#6
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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missing control board
So I am missing the Dometic Analog Control board that's in this zoomed picture. I have since ordered a new one which comes with a thermostat that I wont need, but ok. There is a wiring harness from the Precision A/D converter that goes to the control board, and I can see red, white and blue wires that look taped together and don't go anywhere. The red say "TO TSTAT".
@Lincman983 - do you have a wiring diagram for this interface?
Vin - CKN7815
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04-19-2023, 12:10 PM
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#7
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Commercial Member
Join Date: Nov 2019
Location: Lakeville, IN
Posts: 689
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Quote:
Originally Posted by shepardmike
So I am missing the Dometic Analog Control board that's in this zoomed picture. I have since ordered a new one which comes with a thermostat that I wont need, but ok. There is a wiring harness from the Precision A/D converter that goes to the control board, and I can see red, white and blue wires that look taped together and don't go anywhere. The red say "TO TSTAT".
@Lincman983 - do you have a wiring diagram for this interface?
Vin - CKN7815
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Here are some prints of the a/c controller, multiplex harness. Not dure if that model of a/c has the heat pump but I attached a print for it as well.
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04-19-2023, 01:28 PM
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#8
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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Quote:
Originally Posted by Lincman983
Here are some prints of the a/c controller, multiplex harness. Not dure if that model of a/c has the heat pump but I attached a print for it as well.
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That looks like them! Thanks...
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04-23-2023, 07:07 AM
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#9
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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Quote:
Originally Posted by shepardmike
So what else do I need to address?
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Darn, nobody mentioned the Dometic drain kit
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04-26-2023, 01:21 PM
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#10
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Diesel Rep West Coast
Join Date: Apr 2020
Posts: 457
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are you referring to the drainage pump?
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04-27-2023, 08:20 AM
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#11
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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05-26-2023, 12:19 PM
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#12
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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Wiring it up
So I got the drain kit installed and now I am struggling with the wiring. The connector coming off the Digital/Analog control board has 5 wires, AFH, AFL, COMP, AHT and GND. The Dometic control box has 4 wires, +12 V to T-STAT, +12 From Supply, -12V from Supply and to T-STAT, and COMM.
Do I have to open the controller and try to find AFH (Fan High), AFL (Fan Low) and splice into them?
Dometic controller = 3316230.700
Maybe there is a specific controller to install?
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05-30-2023, 11:46 AM
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#13
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2023 Allegro Bus 45OPP
Join Date: Feb 2020
Posts: 211
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Parts Dept #
Eric or Linc,
I am trying to call FR Parts Dept. I have in my notes, Jackie Grey @ 574-522-1747.
Is that still valid? All I get is an answering machine .
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06-01-2023, 07:44 AM
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#14
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Commercial Member
Join Date: Nov 2019
Location: Lakeville, IN
Posts: 689
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Yes, that is the correct phone number. I believe the parts dept was closed due to inventory Tuesday.
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