I have a 1993 PB 100 Large Cap vertical cold machine (copying from invoice) on a 1979 Cal 31 with no manual (naturally!) that runs for a few minutes, emits about a 1-2 second beep, then starts again but never cools. I suspected low voltage but batteries test about 13v. Any ideas or how to get a manual/schematics? Thanks. John
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Mine too
Mine does that also. I was concerned that it was low voltage but I read 13V at the compressor. I also directly connected it to the batteries (with a breaker) with a 3' 10 guage wire. I had a guy look at it and he told me it had freon so I am running out of options?
Mine does that also. I was concerned that it was low voltage but I read 13V at the compressor. I also directly connected it to the batteries (with a breaker) with a 3' 10 guage wire. I had a guy look at it and he told me it had freon so I am running out of options?
Beep
John, look for voltage drop as Peter did. Measure voltage at the condensing unit. Look for a drop when you hear the "beep". That's when the control module is attempting to start the compressor. If there is no drop, the problem is most likely the control module. Give me a call @ 860-664-4911, 8 to 5 east coast time and we can get into more detailed trouble shooting. Gary
John, look for voltage drop as Peter did. Measure voltage at the condensing unit. Look for a drop when you hear the "beep". That's when the control module is attempting to start the compressor. If there is no drop, the problem is most likely the control module. Give me a call @ 860-664-4911, 8 to 5 east coast time and we can get into more detailed trouble shooting. Gary
control module
Gary is correct, the voltage needs to be measured at the power connections on the module, there should be no more than 1/2 a volt drop upon start attempt. If the voltage is good, the next step is to ohm out the compressor for the proper resistance readings ( top pin to bottom pin should read 2.5-4.5 ohms. Bottom pin to either side pin should read .2-.4 ohms)If the readings are within these parameters, the compressor is good and the problem is the module. If either of you find that the module is at fault (most likely), a new one can be ordered from frigoboat. The cost is 198.00 plus shipping. You can call 1 800 776 7948 or order online at www.frigoboat.com The replacement module will work with any danfoss compressor model BD30 and earlier.
Gary is correct, the voltage needs to be measured at the power connections on the module, there should be no more than 1/2 a volt drop upon start attempt. If the voltage is good, the next step is to ohm out the compressor for the proper resistance readings ( top pin to bottom pin should read 2.5-4.5 ohms. Bottom pin to either side pin should read .2-.4 ohms)If the readings are within these parameters, the compressor is good and the problem is the module. If either of you find that the module is at fault (most likely), a new one can be ordered from frigoboat. The cost is 198.00 plus shipping. You can call 1 800 776 7948 or order online at www.frigoboat.com The replacement module will work with any danfoss compressor model BD30 and earlier.
Tested, but confused
Gary and Bill, Thanks so much for your assistance. Let me tell you what I found from Gary's advice: the batteries test at 13V at the main panel, I tested w/ a multimeter (diff from the built in panel one) at the little terminal that is wired to the same terminals as the fan (labeled C and D) that has 4 little terminal screws and is labeled "PWR DUCT FAN" with a and - indicator. Voltage there was slightly less than 12V and when it beeped, dropped to close to zero. Then the fan would start right back up but no cooling or apparent "compressing" going on. It's hard for me to troubleshoot w/out a schematic since I really don't know this stuff that well. Any way to get one or do you now know what it is? On what looks like module (where everything's wired) it says "BD102N3107 12V DC for BD2 compressor only" There's a diagram attached (I hope). Thanks much, John
Gary and Bill, Thanks so much for your assistance. Let me tell you what I found from Gary's advice: the batteries test at 13V at the main panel, I tested w/ a multimeter (diff from the built in panel one) at the little terminal that is wired to the same terminals as the fan (labeled C and D) that has 4 little terminal screws and is labeled "PWR DUCT FAN" with a and - indicator. Voltage there was slightly less than 12V and when it beeped, dropped to close to zero. Then the fan would start right back up but no cooling or apparent "compressing" going on. It's hard for me to troubleshoot w/out a schematic since I really don't know this stuff that well. Any way to get one or do you now know what it is? On what looks like module (where everything's wired) it says "BD102N3107 12V DC for BD2 compressor only" There's a diagram attached (I hope). Thanks much, John
Attachments
Anybody still here?
Wondered if anybody from AB (or w/ knowledge)was still checking this forum. I was hoping for a reply from Gary or Bill to my post of 4/1. TIA John
Wondered if anybody from AB (or w/ knowledge)was still checking this forum. I was hoping for a reply from Gary or Bill to my post of 4/1. TIA John
Compressor fails to start
· Danfoss BD 2.5 and BD 3 compressors failure to start Repeated failure of start and a audible cycle beep is caused by a program in the electronic unit. It is programmed to stop the compressor if; #1 The voltage is below 11.5 volts during start .. Check batteries for charge. Check for a resistance connection. The best and quickest way to do this is run a temporary set of wires from a fully charged battery to the compressor electronic module. The wire size and polarity is important. #2 The fan or if water-cooled, the pump relay is drawing more than one amp.. To check disconnect one of the wires to fan. If the compressor starts OK replace fan. #3 The compressor is going bad and drawing more than 7 1/2 amps.To check install an ammeter in the power wire to the refrigeration unit . It should draw 5 to6 amps, when running, if more than 7 amps, the compressor is about to fail. To do this test the unit must be running. It is sometimes possible with a failed compressor to see a quick movement of the ammeter to 10 amps. or higher. The best test to determine condition of the compressor field windings is to check their resistance with an ohmmeter. Email if you need figures #4 If the above checks do not determine the cause the electrical module is defective. WARNING, do not install a new module on a compressor that tests bad with the ohm meter. For more information on BD compressors see, http://www.Kollmann-Marine.com
· Danfoss BD 2.5 and BD 3 compressors failure to start Repeated failure of start and a audible cycle beep is caused by a program in the electronic unit. It is programmed to stop the compressor if; #1 The voltage is below 11.5 volts during start .. Check batteries for charge. Check for a resistance connection. The best and quickest way to do this is run a temporary set of wires from a fully charged battery to the compressor electronic module. The wire size and polarity is important. #2 The fan or if water-cooled, the pump relay is drawing more than one amp.. To check disconnect one of the wires to fan. If the compressor starts OK replace fan. #3 The compressor is going bad and drawing more than 7 1/2 amps.To check install an ammeter in the power wire to the refrigeration unit . It should draw 5 to6 amps, when running, if more than 7 amps, the compressor is about to fail. To do this test the unit must be running. It is sometimes possible with a failed compressor to see a quick movement of the ammeter to 10 amps. or higher. The best test to determine condition of the compressor field windings is to check their resistance with an ohmmeter. Email if you need figures #4 If the above checks do not determine the cause the electrical module is defective. WARNING, do not install a new module on a compressor that tests bad with the ohm meter. For more information on BD compressors see, http://www.Kollmann-Marine.com
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