Possible Failures Of Air-Conditioning And Cab Heating Systems And Instructions For Troubleshooting - Belarus 2022.6 Operator's Manual

6.16 Possible failures of air-conditioning and cab heating systems and
instructions for troubleshooting
List of possible failures of air-conditioning and cab heating systems and guidelines
for troubleshooting are shown in Tables 6.16.1 and 6.16.2.
Table 6.16.1 – Possible failures of air-conditioning and cab heating systems and
guidelines for troubleshooting
Failure, external manifestations,
cause
Coolant is not circulated through
heating unit:
- turn over heater control valve
- heater fan is out of order
Leakage of coolant in heating ra-
diator
Leakage of coolant in heating sys-
tem connection
WARNING: DURING TRACTOR DISCONNECTION, CLOSED-CIRCUIT AIR
CONDITIONING SYSTEM MAY BE DETACHED BY MEANS OF SEPARATION OF A
QUICK DISCONNECT COUPLER. DISCONNECTION SHALL BE PERFORMED BY UN-
SCREWING CAP NUT "B" (FIGURE 6.15.1) (WITH HEXAGON SCREW KEY SIZE
30MM) FROM VALVE "A" (WITH HEXAGON SCREW KEY SIZE 29 MM)! WHILE CON-
NECTING THE DUCT, IT IS NECESSARY TO PUT SILICONE SEALANT ON THE
THREAD. AFTER THREE OR FIVE DISCONNECTIONS A LEAKAGE CAN OCCUR IN
THE JUNCTION POINT – IN THIS CASE IT SHALL BE REPLACED!
WARNING: WHILE DISCONNECTION AND CONNECTION OF DUCTS, WEAR
PROTECTIVE GLOVES AND GLASSES!
WARNING: ANY OPERATIONS RELATED TO DISCONNECTION OF AIR CON-
DITIONING SYSTEM COMPONENTS SHALL BE CARRIED OUT ONLY BY TRAINED
PERSONNEL WITH USE OF SPECIAL EQUIPMENT FOR AIR CONDITIONING SYSTEM
MAINTENANCE. HIGH PRESSURE IS MAINTAINED EVEN IN THE SHUT SYSTEM!
WARNING: COOLING AGENT R134A IS NON TOXIC, NON COMBUSTIBLE, NOT
FORMING EXPLOSIVE MIXTURES. COOLING AGENT BOILING TEMPERATURE UN-
DER NORMAL CONDITIONS IS MINUS 27 ° С. IN CASE OF SKIN CONTACT WITH LIQ-
UID COOLING AGENT, IT FLASHES AND CAN CAUSE OVERCOOLING OF SKIN AR-
EAS!
WARNING: ONLY SPECIALLY TRAINED PERSONNEL IS ALLOWED TO PER-
FORM REPAIR AND MAINTENANCE SERVICES OF SYSTEM COMPONENTS!
Warm air is not supplied into the cab
Warm air of high humidity is supplied into the cab
Troubleshooting
Open the heater control valve
Correct the fan failure, check electric circuit of fan
engagement according to the electrics diagram of
electrical equipment
Leakage of coolant in heating radiator
Leakage of coolant in heating system connection
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2022.6-0000010 OM