Hi
I have an issue with a Mitsubishi city multi system not providing much heat.

system is circa 2001 - but still in reasonable condition. Outdoor is a PURY P250 YMF with 9 ducted PDYF P20 indoor units. I suspected it may have been short of gas - but recovered and gas charge - is as per commissioning sheet.

Hot gas seems to reaching the BC box(49c) - but air off temp at indoors is only around 22c

I got the following data from sw1

Comp freq 82
Discharge 20 bar
Suction 3 bar
BC box P1 47 P3 39
TH11 10.3
TH12 1.7
TH13 99?
TH14 99?
TH15 0
TH16 12.8
LEV 3 440

INDOOR LEV'S - ALL AT 2000

Any ideas?