Pls check the following: 1# With both tank vulve open, Check the refrigerant tank & make sure it has suffecient amount of refrigerant( min.6kg) to charge.2# Check charging solenoid (S-10), & Tank liquid solenoid's (S-8 & 9) it may need to rebuild.3# Check service coupler is opening properly.If all this are OK,then you may need to replace the main circuit board.Hope this will help you to solve the problem.
Answers & Comments
Pls check the following: 1# With both tank vulve open, Check the refrigerant tank & make sure it has suffecient amount of refrigerant( min.6kg) to charge.2# Check charging solenoid (S-10), & Tank liquid solenoid's (S-8 & 9) it may need to rebuild.3# Check service coupler is opening properly.If all this are OK,then you may need to replace the main circuit board.Hope this will help you to solve the problem.