Master Bilt IM-23-HGP, Руководство по установке и эксплуатации

Страница: 10 / 16

10
SERVICE INSTRUCTIONS
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. Ice merchandiser not cycling – coil blocked with frost:
A. Defective temperature controller, or improper settings.
B. Refrigerant overcharged.
C. Location too hot.
D. Condenser clogged.
E. Condenser fan motor defective.
F. For freezer, defrost heater not operating.
G. Air leakage into ice merchandiser due to open door or faulty door seal.
5. Compressor starts and runs – but cycles on overload:
A. Low voltage
B. Relay defective.
C. Overload defective.
D. High head pressure (see #1).