Справочник Пользователя для Master Bilt GT-40
12
TROUBLE SHOOTING GUIDE
1.
High head pressure and high back pressure:
A.
Condenser coil clogged or restricted.
B.
Condenser fan motor defective.
C.
Air in the system.
D.
Refrigeration overcharge.
2.
Low back pressure and low head pressure:
A. Expansion
valve
restriction.
B. Refrigerant
undercharged.
C.
Leak in system.
3.
Pressures normal – cabinet warm:
A. Refrigerant
undercharged.
B.
Control set too warm.
4.
Compressor starts and runs – but cycles on overload:
A. Low
voltage.
B.
Overload protector defective.
C.
High head pressure (see#1).
5.
Compressor will not start – hums, but cycles on overload:
A. Low
voltage.
B. Relay
defective.
C. Overload
defective.
D.
High head pressure (see #1).
6. Cabinet
sweating:
A. High
ambient
humidity.
B.
Defective condensate heater.
7.
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.
8.
Gravity coil will not defrost (coil loaded with ice or frost)
A.
A.
Solenoid in timer sticking closed, preventing unit from going defrost.
B.
Defrost termination thermostat is defective.
C.
Safety thermostat is defective.
D.
Timer defrost is not set at minimum 34 minutes
E.
Defective defrost coil heater.
9.
Defrost cycle too long.
A.
A.
Defective time clock solenoid.
B.
Defective defrost end thermostat and/or defective safety thermostat.