Want to purchase a 34788NI-H Rob Cooltech machine. This year GM made us buy the same piece of equipment but for the 134yf Freon. That machine is extremely slow, is the 34788 that slow also?

Hasan Khan Amran

• 184 Answers

SOURCE: Hi. We've got a CoolTech 34788. Whenever the

It's sound like normal. However when thes message come again you just press Stop/No key to terminates this function. Press Recover & see if the machine is going to recovery after self clearing. If it is then you can continue to work. Hope this will help you best of luck!

Posted on Jul 04, 2010

Hasan Khan Amran

• 184 Answers

SOURCE: We have a cooltech 34700Z.

1# CHECK CHARGE SOLENOID, IT MAY NEED TO REPLACE.
2# OPEN FRONT DOWN COVER AND CHECK "LIQUID" HOSE QUICK CONNECTOR ON ISV TANK

Posted on Sep 21, 2010

Hasan Khan Amran

• 184 Answers

SOURCE: robinair cooltech 34788 scale error reset

You may overfill the ISV tank. #1 Open front cover & close LIQUID valve on the ISV. #2 Disconnect LIQUID hose from tank,then open tank liquid valve (which you close earlier) to reduce some refrigerant manually from the ISV tank. #3 after reduce refrigerant from tank, re-connect everything & switch on the machine. #4 If you still have the same problem then you have to re-calibrate the scal. I hope this will help you

Posted on Nov 05, 2010

Hasan Khan Amran

• 184 Answers

SOURCE: Robinair cooltech 34788 displaced high

You Have to replace the PCB Relay Board

Posted on May 17, 2011