I have a 1991 Volvo 240 that has been retrofitted from R11 to R134a. While the ac is somewhat cold, I am a little confused with the meaning of the manifold gauge readings. [url][url=https://postimg.org/image/pujgpd0lr/]

Granted, this is an el-cheapo model of a manifold gauge set, but I don't think the high side should be this low
[url][url=https://postimg.org/image/pt9ivxyrz/]

Outside air temp:
[url][url=https://postimg.org/image/3st6fbg3z/]

Air through vent on MAX and recirculate mode enabled:
[url][url=https://postimg.org/image/pqpn93v4f/]

Any ideas on where to start?
Thank you in advance for your tips and suggestions!