Possible Failures Of Air-Conditioning And Cab Heating Systems And Guidelines For Troubleshooting - Belarus 1822.3 Operator's Manual

7.15.8.29 The pilot lamp of hydraulic-brake fluid low level in the tanks of brake con-
trol system activates on the pilot lamps unit HG1 when the system is filled up.
) Check sensor operability of hydraulic-brake fluid SL1 level for which it is required
to remove the socket from the sensor. If the lamp goes out – replace the sensor. If the
lamp does not go out, check the circuit operability in the system sensor – pilot lamp PLU
HG1 for presence of locking on tractor body. If the circuit is short cut – eliminate the fail-
ure.
b) If the sensor SL1 and the electrical circuit sensor SL1– pilot lamp PLU HG1 op-
erate properly (there is no locking) – replace the pilot lamps unit.
7.15.8.30 The pilot lamp of heating plugs operation signaling in the pilot lamps unit
HG1 does not operate while heating plugs operate normally.
Lock the contact of HP pilot lamp activation in PLU for tractor "load" by means of a
bonding strip for a short period. In case the lamp does not activate, check supply voltage
availability of PLU. If there is no supply voltage – replace the PLU. If there is no supply volt-
age, eliminate the circuit breakage from fuse block F5 to the PLU.
7.16 Possible failures of air-conditioning and cab heating systems and guide-
lines for troubleshooting
List of possible failures of air-conditioning and cab heating systems and guidelines
for troubleshooting are shown in Tables 7.16 and 7.16b.
Table 7.16b – 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 operation
Warm air of high humidity is supplied into the cab
Leakage of coolant in heating ra-
diator
Leakage of coolant in heating sys-
tem connection
WARNING: DURING TRACTOR DISCONNECTION CLOSED-CIRCUIT AIR CON-
DITIONING SYSTEM MAY BE DETACHED BY MEANS OF SEPARATION OF QUICK
DISCONNECT COUPLER. DISCONNECTION SHOULD BE PERFORMED BY UN-
SCREWING OF CAP NUT "B" (FIGURE 7.16.1) (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
JUNCTION POINT – REPLACE IT IN THIS CASE!
WARNING: WHILE DISCONNECTION AND CONNECTION OF DUCTS WEAR
PROTECTIVE GLOVES AND GLASSES!
Warm air is not supplied into the cab
Open heater control valve
Correct fan trouble, check electric circuit of fan
switching on according to electrics diagram in An-
nex B.
Stop leakage or replace heating radiator
Tighten up coupling bands
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2022.3-0000010 OM
Troubleshooting