13
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 system for proper defrosts settings and operation.
1.
Set three 30 minutes per 24 hours
.
E. Check condensing unit for vibrating or rubbing tubing. Dampen and clamp as required.
F. All valves should be completely opened counter-clockwise.
G. Check for the interior of the wall panel. All vertical latch access holes should be on the left side of the
panes.
H. Replace all service valve caps and latch unit covers.
.
SERVICE INSTRUCTIONS
(Trouble Shooting Guide)
1.
High head pressure and high back pressure
A.
Condenser coil clogged or restricted.
B.
Condenser fan motor defective.
2.
Low back pressure and low head pressure
A.
Restriction in system.
B. Refrigerant
undercharged.
C.
Leak in system.
3.
Pressures normal – Cabinet warm
A.
Coil blocked with frost or ice
B. Refrigerant
undercharged.
C.
Control set too warm.
D. Air
screen
disturbance.
4.
Coil blocked with frost or ice
A.
Defective temperature control.
E.
P-trap in drain not installed.
B.
Time clock not operating properly.
F.
Doors aren’t sealing when closed.
C.
Improper time clock setting.
G.
Evaporator fans motor defective.
D.
Defrost heater not operating.
I.
Low voltage.
5.
Compressor starts and runs – but cycles on overload
A. Low
voltage.
B.
Dropped phase (3 phase).
C.
Overload protector defective.
D.
High head pressure (See #1).
