FINAL CHECK LIST
A.Check operating pressures.
B.Check electrical requirements of unit to supply voltage.
C.Set temperature control for desired temperature range.
D.Check sight glass for proper refrigerant charge, if provided.
E.Check system for proper defrost settings and operation.
F.Check condensing unit for vibrating or rubbing tubing. Dampen and clamp as required.
G.All valves should be completely opened
H.Check packing nuts on all service valves.
I.Replace all service valve caps and latch unit covers.
J.Check and set the door tension at the Torque Adjustment.
SERVICE INSTRUCTION
1.High head pressure and high back pressure:
A.Condenser coil clogged or restricted
B.Condenser fan motor defective.
C.Air discharge in rear of cabinet restricted.
2.Low back pressure and low head pressure:
A.Restriction in system.
B.Refrigerant undercharged.
C.Leak in system
3.Pressure normal – cabinet warm:
A.Coil blocked with frost (see #4).
B.Refrigerant undercharged.
C.Control set too warm.
4.Cabinet not cycling – coil blocked with frost:
A.Defective temperature controller.
B.Refrigerant overcharged.
C.Location too hot.
D.Condenser clogged.
E.Condenser fan motor defective.
F.Defrost heater not operating.
5.Copressor starts and runs – but cycles on overload:
A.Low voltage
B.Relay defective.
C.Overload defective.
D.High head pressure (see #1).
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