York

Charge

Protect

Charge (SH piston / SC TXV)

Wrong charge method is as common as wrong charge.

3 plates — walk the one on the cabinet

First check

1 Airflow and freeze before you add gas

On York YC2E low pressure / freeze is indoor airflow or a starved coil until proven otherwise. Filter, blower, dirty A-coil, closed supplies. In heat mode, a iced outdoor coil is the same family. Indoor piston: charge by superheat. Indoor TXV: charge by subcooling.

Expect: Indoor air moving. Coil not iced. OD coil clear in heat.

The rest of the walkthrough is Diagnose.

On the plates

Indoor piston: charge by superheat. Indoor TXV: charge by subcooling.
Do not use Greenspeed weigh-in-only as the only method unless the factory TXV rating plate on THIS outdoor says so. Most 24ACC are piston/TXV conventional.
Line-set length and indoor coil match still matter. Weigh-in after a repair, then finish on SH or SC.

Plates that use Charge

YC2E
LX · single-stage condensing unit
Diagnose YC2E — Sign in
YC2F
LX · two-stage condensing unit
Diagnose YC2F — Sign in
YXT
Affinity · two-stage mid
Diagnose YXT — Sign in

Same number, other makers

Charge on York is not the same code on these plates.