20 Most Recent Robinair Cool Tech 34700Z Recovery, Recycling, Recharging - Page 7 Questions & Answers

If it is a 34700-2k or 34700z it could be the check valve that is between the solenoid and the block if it is a 34788 the check valve is brass cap on the side closest to the solenoid. you should be able to blow through the check valves one way they only take 3 psi to open if it will not open it will need replaced

It is the solenoid with the pink wires

the machine came with a calibration check weight in the menue you can check the calibration. if it fails contact your local service center the machines have to be calibrated with certified weights unlike the older machines.

This is a common problem of Model: 34788, 34788-I, 34988, AC34788, GE48800 etc. You need to replace air purge solenoid (Air purge solenoid located on top of the ISV tank, if you open front panel cover then you can see it on top of the tank). After doing above stapes and your problem still exist then you have to replace PCB relay board. Just claim for warranty (Air purge solenoid and PCB relay board) from where you bought the machine. Hope this will help to solve your problem, if so please vote for it for farther help! Good luck

Please check 1# The refrigerant which you'v add to the machine, it may CONTAMINATE or NOT PURE R134a. the machine will purge continue while active VACUUM mode if refrigerant is not origenal ! Identify refrigerant if possible.2# Check the automatic air purge device & air purge solenoid repair or rebuild as require

This is a common problrm of Robinair 34700Z / 347002k & 347112k series machine.so don't worry just do the following :- 1# Verify the ISV tank is not overfilled.if full,remove refrigerant manually from tank. 2# Verify if there is high pressure in the tank.Purge excess air from the tank manually.( Open air purge hose from the tank,then press tank valve as needed) 3#Check the high pressure switch for proper operation,if not then replace high pressure switch.Hope this will solve your problem, if so please vot for it