Toyota RM787U, Руководство по обслуживанию и ремонту

Страница: 1861 / 1976

I01389
Condition: Insufficient cooling
I01449
Condition: Does not cool (Cools from time to time in some cases)
- AIR CONDITIONING AIR CONDITIONING SYSTEM
AC-5
1846
Author: Date:
2001 SIENNA (RM787U)
(4) Poor circulation of refrigerant
Symptom seen in
refrigeration system
Probable cause Diagnosis Remedy
Pressure low in both low and
high pressure sides
Frost on tube from receiver to
unit
Refrigerant flow obstructed by dirt
in receiver
Receiver clogged Replace receiver
(5) Refrigerant does not circulate
Symptom seen in
refrigeration system
Probable cause Diagnosis Remedy
Vacuum indicated on low pres-
sure side, very low pressure indi-
cated on high pressure side
Frost or dew seen on piping be-
fore and after receiver/ drier or ex-
pansion valve
Refrigerant flow obstructed by
moisture or dirt in refrigeration sys-
tem
Refrigerant flow obstructed by
gas leakage from expansion valve
Refrigerant does not circulate
(1) Check expansion valve
(2) Clean out dirt in expansion
valve by blowing with air
(3) Replace receiver
(4) Evacuate air and charge new
refrigerant to proper amount
(5) For gas leakage from expan-
sion valve, replace expansion
valve