View Full Version : SL200 modulation valve
Robert Hilton
13-05-2012, 09:19 AM
I've got a TK SL200 that has a defective modulation circuit
When it kicks in the valve cycles rapidly (buzzing) and the suction pressure drops.
Any ideas?
clivemtk
14-05-2012, 07:29 PM
yeah turnoff modulation
great answer clive typical of you!
Robert Hilton
15-05-2012, 08:16 PM
Indeed, that was the quick and easy solution for the owner/driver, but I was interested if anyone else had come across this before.
clivemtk
15-05-2012, 09:20 PM
dont suppose you have it on hubbards youd turn it off anyway
The modulation valve still operates on unit start up,
there was a problem a few years back ,where the piston ,which is in 2 halfs unwinds on its thread,
does the valve operate ok but just makes a noise when modulating?
Robert Hilton
22-05-2012, 08:30 PM
It operates okay if you connect it directly to 12v supply. It gives code 34 when in operation
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