Question about Hitachi Heating & Cooling
Unit will not switch on , timer light flashes 13 times, ,goes out for 5 seconds and then repeats (fault code for freeze protection thermistor ) , have tried turning unit off both at switchboard circuit breaker and at indoor unit for approx' 30 minutes , then back on again but still wont switch on. Have not used it for cooling this year as yet but has been running without fault for over 6 years , can you direct me to the location of this thermistor , and if so , is it easy to change ?
I am an ex warrenty agent for Hitachi in Western Australia and I will be able to take you through some tests if you want. But from the sounds of it I think that you will be up for a new indoor PCB as these are the most common things to go when there are power failures. If you would like me to go through it with you let me know. But first where abouts are you in Australia?
Posted on Jan 08, 2009
I would really call your installers back mate.
If you have anything to measure air temp with I will take you though some tests.
But at this point I would say that your air con does not have any gas and the installers should come back. If they will not come back you should contact Hitachi warranty
Hope this helps
Posted on Jan 11, 2009
Is the unit responding to remote instruction at all? It does sound like your board is gone. This is usually a capacitor (blue or green and round flat disc) on the pc board, and possibly one of the diodes (small black cylindrical shape with a white line on one side) Often it is the compressor drive relay (rectangular black box) on pc board. If however you have managed to find a replacement board. The plastic heads holding the pc board are released by using a small long nose pliers and pinching the bit sticking through the board. The rest is simply a matter of changing one wire at a time from old board to new board. Or a good method is just to take a snapshot with a camera to refer to regarding the wire positions.
Posted on Mar 05, 2009
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