problem when defrost, always high pressure

[emass814]

dear all, please help me. i just finished making a new tube ice maker, but there is a problem, everytime the machine defrost and the ice came out, the machine get high pressure. i must restart again, but when it restart for about 5-9 minutes, it defrost again. the normal time for defrost are around 20-25 minutes. Please help me and give an explanation why this can happen. If possible please give the diagram picture and the scheme of the machine system.Thank's for helping me.

[Sandro Baptista]

The defrost system is with one tube and return by the wet suction or is a two tubes system, which the hot gas return goes to the condenser?

[emass814]

@sandro : thank's for the reply. The defrost system uses 2 tubes and the hot gas goes to another pipe. Can you please send me the picture / scheme of the system ?

[Sandro Baptista]

Sorry...Isn't 2 tubes at all » one goes with hot gas and the other with the returned mixed vapor and liquid?

[Brian_UK]

It is your design so please provide present scheme layout so that we can comment on it.

[emass814]

@Brian : thank you, about the layout scheme, can you please tell me how to post it ? since I am a newbie here.

[Magoo]

Hopefully the compressor is unloading during hot gas defrost harvest time.

[RANGER1]

Sounds like a Frick ice machine .
Does it make ice inside or outside of tubes?
Hopefully a schematic will be posted soon .

[emass814]

@ Ranger1 : thank's for the reply. It makes the ice inside the tubes.

[Magoo]

Harvest cycle should be around 5 minutes, and tube ice should start dropping with vessel press/temp at or around +5.0'C.
It appears vessel is low on refigerant, is icemaker vessel a flooded evaporator?