Quote:
Originally Posted by CF32907
Perhaps you should look up Danfoss site. They specifically say that low voltage is a major problem, did not give a reason for low voltage. And sport, the only way to check it is with a quality VOM. They also will give you resistant loads for the three wires going to the compressor. Again you need a VOM, Do a little checking before you make quotes to what is correct diagnostics. You have two items, check your voltage, both static and running, if you got 12v then your controller is probably bad. There compressors are damn close to bullet proof, not so with the compressors controllers.
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Absolutely correct CF. The most common issue that causes these tiny 3 phase alternating
current output
motor drivers (MDM) to shut down is low voltage. (voltage collapse under load due to bad
power supply.)
The industry accepted method of checking for poor
power supply input causing the
Motor Driver Module to shut off is with a good multi-meter as you described and you, we and almost all know that is correct.
Talk about 'low voltage spikes' is nonsense. Spikes are usually 'transient high voltage erratic charges and nothing to do with voltage collapse caused by a faulty
battery or defective
battery to MDM
wiring etc.
High voltage spikes: High voltage spikes can damage the MDM, fans and digital controllers. The voltage of these erratic transients can be sufficient to cause arcing and therefore damage
electronics, but easily prevented.
We fit a Voltage Clamp, (AKA Zorb, AKA Spike arrestor), to all systems as
standard and highly recommend all users fit one of these very inexpensive devises to help protect all
electronics coupled to the DC power supply.
We use a type P6KE33CA - TVS Diode, P6KE3 Series, Bidirectional, 28.2 V, 45.7 V, DO-204AC, 2 Pins.
Here is a simple supply voltage test as described on our Ozefridge web site Tech page (Fridge assist):
Click on pic to expand..
Cheers OzePete