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I require help with a series of Sanyo Heat Pumps on R407C
Installed around 5 years ago.
Indoor Units are Ceiling Concealed Type and ducted to areas within space
Each outdoor unit is in the region 14Kw ( Approximate guess)
There are 5 outdoor units linked to 5 Indoor
Only 2 Controllers, I have been told 1 controller linked to 3 systems and 1 controller linked to 2 systems.
In heat mode both controllers display Error Code P4 simultaneously
Will appreciate some feedback
Brian_UK
23-03-2007, 07:19 PM
Abe, try this Sanyo site...
http://www.sanyo.com/industrial/HVAC/Concealed_Duct/Heat_Pumps/index.cfm?productID=1284
I don't know if it is the correct model but you can download technical manual, about 11mb and other docs.
s19652
23-03-2007, 09:51 PM
All p codes are for protective devices - but i cant remember which one P04 is. But its to go with the outdoor maybe a pressure switch.
can find out on monday for you
Best regards
Cofreth
24-03-2007, 06:10 AM
P4 = High pressure switch is activated.
Check your refrigerant pressure, condenser fan and condenser coil cleaniness.
All p codes are for protective devices - but i cant remember which one P04 is. But its to go with the outdoor maybe a pressure switch.
can find out on monday for you
Best regards
Thank you, much appreciated
P4 = High pressure switch is activated.
Check your refrigerant pressure, condenser fan and condenser coil cleaniness.
The outdoor units were slung high up on a wall , and I could not get up to take readings, also was raining.
I started in cooling mode and from a visual point i saw all the fans were operating.
I then switched to Heat mode and thats when both controllers displayed P4
Using two controllers makes it more difficult which outdoor unit is at fault. I think the installer has daisy chained.
3 Outdoors on one controller, two on the other, however both controllers displayed P4 at same time.
quiksilva
24-03-2007, 10:05 AM
From past experience ive always found oceanair very good in helping me out on sanyo splits - didnt realise just how deep you can go via the controllers into the operation of these units. I had something similar 6 months back which was
eventually traced to a dodgy discharge sensor which would initially run the fans at 100% then over the space of 4-5 minutes would drop them down to 0% Helpful!
Electrocoolman
25-03-2007, 12:31 AM
Hi Abe,
Following info from Sanyo Tech man
Symptom: LCD on the remote controller displays CHECK P04. (High-pressure
switch activation warning)
If the system operates again:
High-pressure switch activation
(Both cooling and heating)
Electronic refrigerant control valve
defect
Refrigerant over-charged
(Cooling)
Outdoor unit, heat exchanger dirty,
clogged
Outdoor unit air short
Outdoor fan stopped
(Heating)
Outdoor unit air short
Indoor unit, heat exchanger dirty,
clogged
Large pipe side service valve
closed
Indoor fan stop
Air filter clogged
If the system does not operate again:
Are there connection defects in the wiring?
NO = HP switch defect, YES= Repair wiring!
Electrocoolman
25-03-2007, 12:58 AM
Abe
If you PM me I'll email a pdf that has info....to big to attach here.
Adrian
Electrocoolman
25-03-2007, 07:27 PM
Abe,
Got PM,
Email sent with pdf.
Adrian.
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