Question about Rheem 81VP15S Point-of-Use Electric Water Heater, 15 Gallon, 120v

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Condenser fan wont come on nor will compressor I do have fan op

My rheem heat pump wont pull on compressor or condensing fan I have  fan @ air handler

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Thanks for your Question,
First thing to check is the breaker in the panel to see if its tripped, I would suggest turning to off, then back to on, if it trips right after you have a short, if not you will need to check your fuses at the disconnect, first, shut the breaker off to the condensor, then pull the fuses and Ohm check them, if you have no reading then one or both is bad, I would recommend replacing them both if thats the case, if they check good, then you have bigger issues with your heat pump, if these suggestions do not work let me know and I can go into more indepth proceedures with you on what to do, thanks again,

Posted on Jan 25, 2009


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1 Answer

No condensate coming out of the condensate drain just blows out air

Call Rheem and they will recommend calling installer since tankless computers are non intended as do-it-yourself.
If condensate drain is blowing out 'air' do not forget this air is deadly poison CO gas and will kill you, first giving you a headache that goes away when you are out of house. Remove affected people from home and put into fresh air and lay on side, never on back or they will suffocate. Call 911 immediately and most will recover.
Copy following link for resources and required maintenance for tankless computers that heat water: scroll down to venting and manuals and review each to check how vent lines are set up, and that condensate line is set correctly. However this information is NOT guaranteed to match each model made by Rheem as they advance their product marketing strategy to exclude as much safety information as possible for do-it-yourselfers.
Condensate lines can clog over time. Clean line with compressed air, and soak in clorox, and swing around overhead to remove anything inside line. This line contains bacteria so do it in neighbor's yard.
Not all conditions produce vent condensate. Condensate might not form in vent line if weather is dry and the vent has good draft. But later when conditions change, condensate might begin flowing.
Condensate is caused from burning hydrocarbon fossil fuels in any gas appliance. But problem is bigger with tankless since these appliance consume so much fuel per heating event since tankless are required to heat water rapidly as water passes by in a pipe. This is why tankless require larger incoming gas line, and larger vent line made from specific materials for the vent.
Among the long list of poisonous by-products being vented outdoors into the air our planet breathes is acidic water vapor. If conditions are such that the vapor condenses before reaching outdoor, then the acidic water gathers in the vent line and rolls back toward the tankless computer, and goes down into the condensate drain and then down into your pluming drain where it can corrode pipes and add acid by-product to other environments.
If the acidic water is allowed to fall back into tankless heat exchanger instead of down condensate drain, then eventually it will chew a hole through the special nickle alloy heat exchanger (imagine the hole it will chew through household drain lines), and the surprise will not be evident for a few years until leak develops and the tankless exchanger must be replaced at great expense, plus repairs to shorted motherboard and electrical sensors.
Just don't install tankless computer water heater is best solution for myriad of problems, maintenance, and expense of owning a device that must immediately monitor incoming and outgoing water temperatures and flow rates, incoming gas flow rate and pressure, outgoing vent flow and pressure, interact with a remote control device, while monitoring burn rates and combustion temperature using a computer motherboard that is not protected from line interference or power surge, etc
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Where is the drain pan located?

Sometimes there is no condensate.
Sometimes the drain line is clogged.
Copy following links for GE Heat Pump water heater.
Expanded drawing of 2012 GE heat pump condensation drain reservoir
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Every time it rains our instantanious hot water system comes up with error C9 and C12

Before calling service technician, open following link for Rheem troubleshooting resources including contact and chat and typical manuals:

Error codes are start points for troubleshooting and can include long list of things including multiple causes.
Error code 12 shows 'condensation collar' and 'vent lengths' which are associated with the vent to outdoors. Changes in air pressure during low-pressure rain events MIGHT affect the venting and cause tankless not to ignite, and MIGHT cause excessive condensation. Improper condensation can rust out the heat exchanger without showing any signs of problem until the unit is ruined.
C9 is not listed. Contact Rheem, and then add a comment saying what Rheem suggests as solution for C9 error. This will help others in the community with same-similar problem.

Instruction manual recommends yearly maintenance by qualified service technician.
This maintenance would usually check all things shown in error 12.

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