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  • FIRST POST
    • Jeanbuchan
    • By Jeanbuchan 11th Sep 17, 9:47 PM
    • 7Posts
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    Jeanbuchan
    information and user help for Hitachi Air to Air Heat Pump
    • #1
    • 11th Sep 17, 9:47 PM
    information and user help for Hitachi Air to Air Heat Pump 11th Sep 17 at 9:47 PM
    We had a Hitachi Air to Air Heat Pump System installed in January 2013. Three indoor units and one outdoor unit. After a few teething problems, we were happy with the system and have saved money on electricity bills since. After having the machines switched off this summer I can't get them to work now. I have installed new batteries in the three handsets, reset them and set the time. When switching each machine on a red light flashes which the handbook states is the timer light. I have read the small manual over and over and tried everything I can think of. Three weeks ago I contacted the company who installed the system and after trying a few suggestions from a staff member, I was advised to send photographs of the handsets. I was emailed a thank you for sending them but have had no other reply. I emailed yesterday and up to now I haven't received a reply. My machines are Hitachi Model RAK-25QH8(W). I wondered if anyone else has had a problem with these units. We paid 9500.00 for this system.
Page 1
    • Tiexen
    • By Tiexen 11th Sep 17, 9:55 PM
    • 530 Posts
    • 265 Thanks
    Tiexen
    • #2
    • 11th Sep 17, 9:55 PM
    • #2
    • 11th Sep 17, 9:55 PM
    I can't answer why it doesn't work but why didn't you use it as air conditioning during the summer?
    • matelodave
    • By matelodave 12th Sep 17, 8:36 AM
    • 3,611 Posts
    • 2,241 Thanks
    matelodave
    • #3
    • 12th Sep 17, 8:36 AM
    • #3
    • 12th Sep 17, 8:36 AM
    Is there anything here that helps https://www.hitachiaircon.com/argws/servlet/FileViewer?attachmentId=1463
    Love makes the world go round - beer make it go round even faster
    Look after our planet - it's the only one with beer
    • Jeanbuchan
    • By Jeanbuchan 12th Sep 17, 7:18 PM
    • 7 Posts
    • 1 Thanks
    Jeanbuchan
    • #4
    • 12th Sep 17, 7:18 PM
    • #4
    • 12th Sep 17, 7:18 PM
    We live in Aberdeenshire. Air conditioning not required here.
    • Jeanbuchan
    • By Jeanbuchan 12th Sep 17, 7:19 PM
    • 7 Posts
    • 1 Thanks
    Jeanbuchan
    • #5
    • 12th Sep 17, 7:19 PM
    • #5
    • 12th Sep 17, 7:19 PM
    I have three copies of this book, one for each unit. I've read it all cover to cover many times.
    • Rodders53
    • By Rodders53 13th Sep 17, 10:46 AM
    • 467 Posts
    • 321 Thanks
    Rodders53
    • #6
    • 13th Sep 17, 10:46 AM
    • #6
    • 13th Sep 17, 10:46 AM
    Blinking Timer Lamp indicates that the Unit has detected a fault. This might be on that indoor unit or the outdoor unit.

    That will almost certainly need a service technician call out to rectify?

    But first do a mains power off of the system (outdoor unit main isolator) and wait for 10 minutes or so, then re-power in the hopes a mains reset will fix.

    See http://www.klima.hu/documents/Haszn%C3%A1latik/Hitachi/aw0080erak-18-50ppb-wpb.pdf around p106 on... BUT that may well not be your precise model service handbook, so is just a guide.
    • Jeanbuchan
    • By Jeanbuchan 13th Sep 17, 3:08 PM
    • 7 Posts
    • 1 Thanks
    Jeanbuchan
    • #7
    • 13th Sep 17, 3:08 PM
    • #7
    • 13th Sep 17, 3:08 PM
    Thank you for taking the time to find out this information for us. We already tried switching off the power but I'm not at all sure which switch is the outdoor unit main insulator. We'll have another go and see if that works. I've been on the phone again to the installing company, but they are obviously reluctant to send an engineer all the way up here, in fact it hasn't even been mentioned. They don't appear to sell these heaters now. She's going to have a word with someone else but I'm not very confident. It's 3 weeks since I first spoke to them and I didn't get a reply to the emails I sent this week. I wonder if a local electrician would be able to help, but these units are supposed to be guaranteed for ten years. I'm beginning to think installing this was not one of my better ideas. It seems likely that the outdoor unit is at fault as all three of the indoor units show the blinking red light.
    Last edited by Jeanbuchan; 13-09-2017 at 3:12 PM. Reason: addition
    • Rodders53
    • By Rodders53 15th Sep 17, 4:47 PM
    • 467 Posts
    • 321 Thanks
    Rodders53
    • #8
    • 15th Sep 17, 4:47 PM
    • #8
    • 15th Sep 17, 4:47 PM
    You need a refrigeration/air conditioning / heat pump Company to visit and service the system... One with Hitachi experience.

    Google found me this one http://www.aberdeenairconditioning.co.uk/air-conditioning-equipment but do your own due diligence, and check out trusted trader type info from your local Trading Standards?

    These heatpumps do need a modicum of regular servicing, if only to check and top up - if needed - the refrigerant in the system.
    • lovesgshp
    • By lovesgshp 15th Sep 17, 6:33 PM
    • 1,275 Posts
    • 718 Thanks
    lovesgshp
    • #9
    • 15th Sep 17, 6:33 PM
    • #9
    • 15th Sep 17, 6:33 PM
    I agree with Rodders53 comment above. It does sound like it could be a problem with the refrigerant.
    As Manuel says in Fawlty Towers: " I Know Nothing"
    • Jeanbuchan
    • By Jeanbuchan 3rd May 18, 7:13 AM
    • 7 Posts
    • 1 Thanks
    Jeanbuchan
    We live in northern Scotland and have no need for air conditioning.
    • Rodders53
    • By Rodders53 4th May 18, 11:17 AM
    • 467 Posts
    • 321 Thanks
    Rodders53
    We live in northern Scotland and have no need for air conditioning.
    Originally posted by Jeanbuchan
    But you have such a unit One that can either heat or cool the room spaces, by selecting the mode of operation.

    I have one made by Fujitsu and we've used it both to heat and cool the two rooms it serves over the last few weeks of odd hot and cold weather.

    Did you ever get the system fixed, last September so that you could get heat from them?
    • Jeanbuchan
    • By Jeanbuchan 28th May 18, 3:53 PM
    • 7 Posts
    • 1 Thanks
    Jeanbuchan
    We haven't been able to use the heating since last year. Workmen came in October and said it would be the compressor and I've been told it is expensive to replace this. The company has now gone out of business. The machine is still under guarantee but I'm pretty sure Hitachi won't be interested. I did post about this on the forum but I probably did it in the wrong place. We are now waiting for 2 local firms to have a look, but they are really busy, so it could be a while. Hopefully before next winter..
    • lovesgshp
    • By lovesgshp 29th May 18, 9:24 PM
    • 1,275 Posts
    • 718 Thanks
    lovesgshp
    Suggest you contact Hitachi for a recommended service agent. It does look like a refrigerant or compressor problem.
    I do not know these units, but is there a manual compressor start in the service/installer settings?
    As Manuel says in Fawlty Towers: " I Know Nothing"
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