fridge doctor
28-07-2010, 06:14 AM
Hi Guys,
I have never had to work on these before, but a client has taken over building management which includes them. They are Midea units, the MDV, and each unit serves 4 air handlers one for each room in the apartment (I presume). Each room has a hard wired controller. My Q. is would anyone be kind enough to just give me a quick rundown on the principle. I understand that these (the MDV) do not use bypass or unloading valves.
I have a problem with one at present, I am told it has never worked in one particular room and is now out of warranty. A quick check, the light comes on on the controller, but nothing kicks in on the roof. Would I be right in thinking bad wiring or faulty controller not sending signal? How would such a signal be checked (Low voltage presumably).... Should I hook one of the others up temporarily as a check to see if the controller is faulty? Any advice very welcome. Thank you. Trevor
I have never had to work on these before, but a client has taken over building management which includes them. They are Midea units, the MDV, and each unit serves 4 air handlers one for each room in the apartment (I presume). Each room has a hard wired controller. My Q. is would anyone be kind enough to just give me a quick rundown on the principle. I understand that these (the MDV) do not use bypass or unloading valves.
I have a problem with one at present, I am told it has never worked in one particular room and is now out of warranty. A quick check, the light comes on on the controller, but nothing kicks in on the roof. Would I be right in thinking bad wiring or faulty controller not sending signal? How would such a signal be checked (Low voltage presumably).... Should I hook one of the others up temporarily as a check to see if the controller is faulty? Any advice very welcome. Thank you. Trevor