You need techview to disable that feature but would strongly recommend against it. The fault is based on a ratio between superheat and EXV position. Ratio trip point is 1.75. Most often a failure or...
Type: Posts; User: Dan0721
You need techview to disable that feature but would strongly recommend against it. The fault is based on a ratio between superheat and EXV position. Ratio trip point is 1.75. Most often a failure or...
What pressure is pulling on the pressure switch? May be barely making pressure and then opening again. Maybe check pressure tubing and barbed fitting where the tubing connects to heat exchanger....
[QUOTE=Refrig1234;26046050]I've got a building using a cgwd020 chiller that has been having neusence chilled water flow alarms. (Entering water temp).
Chiller pump appears to run continuous through...
You're using the 60cm/s flow switch. There are 5 different ones. The one you have requires the highest rate of flow. Is this the same flow switch that was originally on the machine? Also what's the...
This is normal. Circuit #2 is the smaller/ lower tonnage circuit. The unit is configured to start the smaller circuit first, because of efficiency. That's why circuit 2 is coming on first in test...
Was this "low refrigerant alarm" a low refrigerant temp or low liquid level alarm? Difficult to tell what your problem is with this information since at full load the EXV is maintaining liquid level...
Did you find the issue? Very likely that the compressor was starting loaded. Either from a stuck slide valve, load solenoid valve leaking through, or clogged unload solenoid valve.
It's displayed on the main menu as "setpoint source". You can change it right there at the front panel. Seems like that's what's going on.
Sounds like it's looking for an external setpoint and just reverting to a local setpoint at the panel. Maybe not getting the external setpoint? If you change it to local setpoint it will probably go...
Compressor is probably starting fully loaded. Possible stuck slide valve.
Need to verify gas pressures. Voyager units are negative pressure burners. Manifold pressure should be -.2" and inlet gas pressure at 7-14". Checking current draw on the ignitor is good to check that...
Strange that it's not giving a diagnostic. Could be getting a starter transition complete input to the compressor starter module when it shouldn't be. Like these guys already said, check your...
The design sequence is in the model number on the machine, digits 10 and 11. The oil return solenoid on the scavenger line is only used with units with a design sequence of C0 and before. They're no...
Looked into this and you're right. The schematic shows that either compressor running will energize both solenoids. My apologies on giving misleading information on that. I also found that those...
This is correct. Even if that guy is right (he's not) then why would you wire the solenoids to remain open in the off compressors? That logic makes no sense. The lowest pressure point on that machine...
This is correct course of action here. You should get Trane involved at this point.
That's weird that they would wire the solenoids that way. Very likely it is causing compressor failures. No, there are no check valves on the oil scavenger lines. That's the point of the solenoids on...
Check differential pressure switch in compressor terminal cover. Factory set to 50psid. Measures differential across oil filter. You check pressure on both sides. May be an issue with the switch oil...
That's interesting insight. I would find it more likely that the compressor would carry oil away being that it would become flooded with liquid and eventually lock up. Could be something to that...
Yeah that's a pretty long line set, gonna need more refrigerant than that. Especially if the condenser is a standard coil and not microchannel.
Ha! I think your right man. The TWE is definitely an air handler split. Maybe he means TTA condenser? idk that is odd.
This was an issue in the manufacturing of those joints. Specifically in the situation you have with tandem compressors. Just like you said, the fitting bulges and cracks the swage joint. Nothing in...
Fair enough. Still, superheat/subcool
Should be able to find the amount of charge needed in the IOM per the length of line set. It will get you close. Then superheat/subcool
Cool man, sounds like you're on it👍
Yeah on the initial compressor start it will draw higher current. That's in rush current, it should then drop to your FLA or below after start. I would check for a voltage drop/imbalance across the 3...
Compressor could be starting loaded. I'd check what the %RLA is at compressor start. The last thing I'd want to do is recovery before exhausting all other possibilities.
Idk man maybe the compressor is going bad. I'd also check for voltage imbalance across all 3 phases. Difficult to troubleshoot that here, would need more info.
I would meg the compressor. On an initial start it will draw higher in rush current. If your not seeing it with your meter and the unit is measuring current with a current transformer, may be an...
There is no setting in the CH530 to bypass the inverters. You bypass the inverter with the wiring as you did. Straight from the contactor to the motors. The chiller will still generate a diagnostic...
What brand and model of machine? Could be a couple things. Leaking unload solenoid valve, clogged load solenoid, stuck piston, leaking wear rings on piston. Good bit of things to rule out there too...
You've been doing this since the 60's!? Congratulations, still give crap advice.
😂 nice story. I don't do residential either. I've got some miles, thanks pal. I came up with legit reasons for the issue described. Not telling to look for restrictions on a liquid line for a HPC....
With all this talk of someone potentially overcharging. Maybe you guys are trying to save face cause you thought a liquid line restriction would cause high pressure 😂
You guys are speculating what someone might do wrong to cause a HPC. It's all conjecture. The post is about high pressure. You can keep guessing all you want about what someone might do to cause a...
If you're trying to add refrigerant, yes. Otherwise, no. There's something else going on there. Not a drier issue.
Don't know why you guys are so focused on the liquid line drier, it's not the issue. Restriction at the liquid line will not cause a HPC
Lots of info left out in the post. Good to include you superheat and subcool readings. Both condenser fans staging on? The first fan will always start on a call for cooling as it is energized from...
The loss of charge diagnostic trips because the ratio between superheat control and exv% exceeded 1.75. You have and actual low charge, transducer issue, suction temp sensor issue, or EXV problem. As...
The manufacturer discovered an issue in their process in which moisture was getting into the mold at the sensors. New sensors that are out now should be more reliable. Nothing you can really do but...
It's usually a term referred to when dealing with chillers, yes. But it can technically be used for anything, so also yes. Just a measure of heat transfer from the refrigerant side to the water side...
I second checking your hoses and the bird feeder. If you're in an area with high winds it can affect the recalibration to properly zero. Simply securing a bucket over the bird feeder can solve this....
I would check pressure drop across the evaporator and look at pressure curve in the IOM to determine proper gpm first. You can also close the liquid line service valve and perform a pumpdown on the...
All wrong, no o ring. You'll lose very little oil from there.
I'm a Trane technician and have taken apart these compressors many times. That plug is just beneath the rotors and after isolating the compressor and transferring refrigerant, there will be very...
Shouldn't get much oil from there at all. No gasket, it is NPT thread. That'll be an easy one. 👍
There are many reasons this could be happening. Check dip switch settings on each compressor module to ensure they're set for the correct FLA for each compressor. What's the current limit setpoint?...
You need to download a service report and configuration using TechView on the original CH530. Install the new display and you'll be prompted to select type of equipment and latest version number,...
No need. Turn off disconnect and verify zero energy. It's a great method to perform starter testing/troubleshooting.
Turn off high voltage and disconnect low voltage from the transformer. Use extension cord to provide control voltage to the starter for testing. Much safer👍