HV ELECTRICAL SYSTEM 76 C. BCS COOLANT DRAINING PROCEDURE COOLANT QUANTITY: 3.6 Lit COOLANT SPECIFICATIONS: Ratio 40:60 - Ethylene Glycol + Water DRAINING PROCEDURE NOTE: ‘While draining the coolant BCS Aux. tank Cap must be in open condition’. Ensure MSD (Manual service disconnect) is remove before coolant draining. 1. Ensure that BCS is coolant temperature is normal (equal to ambient temperature) before draining. 2. Remove coolant hose connection from battery Inlet and Outlet. 3. Remove cap of auxiliary coolant tank. 4. Wait till coolant gets drain from battery Inlet and Outlet ports and mating hoses. 5. Pass pressurized air from battery inlet port to and coolant will come out from battery outlet port. It is to flush out coolant battery side. 6. Close auxiliary tank cap and pass pressurized air from mating hose of battery outlet port and coolant will come out from battery inlet hose. It is to flush out coolant from chiller unit, BCS pump and BCS hoses. D. BCS COOLANT FILLING PROCEDURE 1. Open the Aux Tank and fill coolant up to Max mark on Aux Tank. 2. Ensure that all hoses are connected and clamps are fitted properly before filling coolant from auxiliary tank 3. Initially fill coolant till neck of auxiliary tank 4. Turn ON ignition and BCS pump will start working 5. After starting BCS pump, coolant will start circulating in the system and coolant level will drop in the auxiliary tank 6. Fill the coolant up to the MAX level in the auxiliary tank and after filling keep system running for 10 minutes. If coolant level drops then top up till MAX level. 7. After completion of work drive vehicle for 1.5 - 2 kilometres and check coolant level. If it drops then top up till MAX level. NOTE As soon as ignition is turn ON, coolant pump start operating. If coolant doesn’t reach up to pump then pump gets OFF (detects dry run) to avoid dry run of pump. It starts again after fix time interval. This type of ON / OFF attempts of pump happens 20 times. Once coolant reaches to pump, it keeps running continuously.
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