mitsubishi pury

[gravick]

I have 2 Mitsubishi pury p 400`s connected together freezing up. Master unit runs okay but pipework freezes up, slave unit the accumulator is a block of ice and pipework freezes up.
Have tried added refrigerant but compressor on slave locks up with liquid.
Any ideas

[nike123]

You should recover all refrigerant from both units and weigh in correct amount. Than you can proceed with your troubleshooting further!

[gravick]

have taken out 69 kg of r410a which is the amount stated on data badge.
acc inlet temperature on slave is -5.7c
acc inlet temperature on master is 19.7c
heat exchanger temp on slave is 15.6c
heat exchanger temp on master is -2.9
seems opposite to each other
mitsubishi says low on refrigerant not sure myself now, could problem be reversing valve?

[gravick]

acc inlet temp on slave -5.7 on master 19.7
heat exchanger temp on slave 15.6 on master -2.9
mitsubishi says low on refrigerant because h/p 13.6 and l/p 2.3 on both units
could problem be reversing vallve on slave unit?
any suggestions gratefully received