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Author Topic: Sanyo Heat Pump Unit not working after power outage  (Read 8790 times)
MacBeagle
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« on: April 29, 2012, 01:12:18 PM »

Sanyo CO2 Eco 9Kw SHP-C90GDN heat pump unit

Hi

Had power outages in the night - on-off 5 times in rapid succession. Thought at the time it might be doing some damage but it happened so quickly I had no chance to switch the unit off. Sure enough I have got the error screen screaming at me "ERROR - TANK - COMM ERROR - CALL SERVICE". Checked the trips - OK, checked power into outside unit - OK. Since it was unlikely that the heat pump was actually in operation at the time am I looking at a blown PCB in the tank unit? Anybody know a service agent near Bristol?

Cheers

Andy
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Sean
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« Reply #1 on: April 29, 2012, 01:28:39 PM »

Sanyo CO2 Eco 9Kw SHP-C90GDN heat pump unit

Hi

Had power outages in the night - on-off 5 times in rapid succession. Thought at the time it might be doing some damage but it happened so quickly I had no chance to switch the unit off. Sure enough I have got the error screen screaming at me "ERROR - TANK - COMM ERROR - CALL SERVICE". Checked the trips - OK, checked power into outside unit - OK. Since it was unlikely that the heat pump was actually in operation at the time am I looking at a blown PCB in the tank unit? Anybody know a service agent near Bristol?

Cheers

Andy


has the outside unit got it's own isolator ? - it should do

this is certainly true with the Ecodans - the controller, the brain has to be turned on before the external unit - if the outside unit is turned on, and doesn't see a controller it goes to sleep

this might be similar to yours
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ecogeorge
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« Reply #2 on: April 29, 2012, 02:38:12 PM »

Have you tried turning the power off , have a cup of tea then turning it on again?  Modern electronics often gets "stuck" when the power supply is wrong.
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clivejo
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« Reply #3 on: April 29, 2012, 02:38:46 PM »

Try switching off the power to the unit for a couple of minutes and then turn it back on.
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DISCLAIMER : Iím not responsible for anythingÖ for anything I say or do. Cos Iím a proud member of clan Eejit who once ruled Ireland.
MacBeagle
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« Reply #4 on: April 29, 2012, 03:43:54 PM »

WELL, what can I say - did everything you said and, hey presto the outside unit is spinning merry as I type. I did all those things before but obviously not for long enough or in the correct sequence.


Many, many thanks

Andy

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clivejo
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« Reply #5 on: April 29, 2012, 08:24:49 PM »

It was obviously the cup of tea that cracked the nut!  Like that saying a watched kettle never boils!
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DISCLAIMER : Iím not responsible for anythingÖ for anything I say or do. Cos Iím a proud member of clan Eejit who once ruled Ireland.
Panda
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« Reply #6 on: May 12, 2012, 08:06:36 PM »

Glad you got it sorted. Some possibly useful background information if you get this type of fault again: The cable between the tank unit and outdoor unit has 4 cores: live, neutral, earth, and communication. The communication signal is referenced to the neutral. This arrangement is fairly common in the air-conditioning industry.
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