Grunert AC450 Refrigeration

Sep 12, 2019
14
Hunter 450 Passage San Diego
Hello,
The next thing on the list to repair is my refrigeration system. It's been struggling to start and sometimes trips overvolt protection on my inverter, It also warbles a bit while running sometimes. Reading another post about this similar issue, I see that a good place to start is by getting a new start capacitor. While I'm at it, I plan to change out the run capacitor as well for good measure. The issue I'm running into is I can not locate an exact replacement start capacitor (Philips 3534B8A02700A330B3, S330/270, 330V AC, 50/60HZ, 270-324 MFD) My question is, I found another brand with the same specs (Link), would this be a sufficient replacement?
 

JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
7,745
Hunter 430 Waveland, MS
You may have many issues.

1) R22 leak
2) Thermostats
3) Start up Relay [my guess]
4) much more...

You must change things in a pair. Relay and capacitor.

Grunert AC450 is not made anymore.

If you need more help from me, let me know.

Jim...
 
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Sep 12, 2019
14
Hunter 450 Passage San Diego
Alrighty lets do it.

1) no leaks, fridge/freezer gets super cold (holds ice-cream), doesn't run but 5 to 10mins per hour or less.
2) New thermostats, working as intended.
3) Start up relay sounds about right.

I'm ready to change things out as needed to get this back in working order.

Start Relay part number 74-502414 3
Run Capacitor Amrad P/N: R2000/37 - 156 (also marked P/N: 33231)
Start Capacitor Philips 3534B8A02700A330B3, S330/270, 330V AC, 50/60HZ, 270-324 MFD

Looking further into it, I'm unable to find any of these exact matches.
 

JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
7,745
Hunter 430 Waveland, MS
Since Tecumseh made your compressor, they can match the pair for you.

I do not want to tell you wrong, but I tried to get the new R404a unit , so my data may be mixed up.

Model: AKA9428EXA
Relay: K71-02
Start Cap: K146-25
Integral Relay Box: AE1227-001 or AE1227-001-X


If you can see the tag on your compressor, I can decode the Model number.

We can chat by phone when needed, but I must do a few things right now.

Jim...

PS: I have all info you need.;)
 
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