SubZero 632 need info

[jumptrout51]

Code 21 on a SubZero 632 refrigerator.
Anyone have any code info on this.
 On the initial call I found the suction in a vacuum and the FF side was warm.
Recharged with 134a to 6 psi.
On a follow up call today I found a suction psi of 12,head at 100 psi.
FF temp was at 34 degrees.Code 21 and SERVICE is flashing on display.
Because of the rise in pressure from what I originally found and what I charged it to I am suspecting a restriction in the system that broke free.Still need to know what the code is and a service manual if anyone has it available.

[niobrara]

Defrost overheat

[krazytech]

You have a leak low side should be 0-10 psi to 30-38 psi  high side 110 psi to 130 psi

a. Check for proper mounting and location of freezer evaporator thermistor and defrost heater.  Remount
correctly.
b. Check for correct wire connection at control board, Blue wire at E2 on control board.  If connected to
wrong pin, reconnect correctly.
c Check for electrical short of Blue wire to another circuit.  Repair Blue wire &/or electrical connections.
d. Check for proper operation of defrost terminator: Cut-in 30°F(-1°C) / Cut-out 55°F (13°C).  For model
601F-2 ONLY: Cut-in 30°F (-1°C) / Cut-out 70°F (21°C).  Replace if defective.

[krazytech]

check for an Ice ball at the evaporator inlet?...

[AJ]

JOB AID #3758407 Sub-Zero Built-iin (600--2) Series Refrigerator Service Manual

[jumptrout51]

Perfect guys. Just what I needed. Thanks.