1. INSPECTION WITH PRESSURE SYMPTOM Symptoms | Reference | Both high and low pressure sides are low | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | Both high and low pressure sides are high | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | High and low pressure sides are equal, high-pressure side is low | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | High-pressure side is high | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | Low-pressure side is low | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | Low-pressure side is high | Refrigerant Pressure with Manifold Gauge Set > INSPECTION |
2. BOTH HIGH AND LOW PRESSURE SIDES ARE LOW | STEP | CHECK | YES | NO | 1.CHECK REFRIGERANT LEAKS. Check the refrigerant for leaks. Refrigerant Leak Check > INSPECTION NOTE: When high-pressure side is less than 0.69Mpa: Go to step 2. | Are there refrigerant leaks- | Repair the refrigerant leaking points. | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | 2.FILL PROPER AMOUNT OF REFRIGERANT. Drain all refrigerant, and refill proper amount of refrigerant. • Recovery: Refrigerant Recovery Procedure > PROCEDURE • Fill: Refrigerant Charging Procedure > PROCEDURE | Is refrigerant pressure within the standard value- | Refrigerant pressure is normal. | Perform corresponding “INSPECTION WITH PRESSURE SYMPTOM”. |
3. BOTH HIGH AND LOW PRESSURE SIDES ARE HIGH | STEP | CHECK | YES | NO | 1.FILL PROPER AMOUNT OF REFRIGERANT. Drain all refrigerant, and refill proper amount of refrigerant. • Recovery: Refrigerant Recovery Procedure > PROCEDURE • Fill: Refrigerant Charging Procedure > PROCEDURE | Is refrigerant pressure within the standard value- | Refrigerant pressure is normal. | Perform corresponding “INSPECTION WITH PRESSURE SYMPTOM”. |
4. HIGH AND LOW PRESSURE SIDES ARE EQUAL, OR HIGH-PRESSURE SIDE IS LOW | STEP | CHECK | YES | NO | 1.CHECK REFRIGERANT LEAKS. Check the refrigerant for leaks. Refrigerant Leak Check > INSPECTION NOTE: When high-pressure side is less than 0.69Mpa: Go to step 2. | Are there refrigerant leaks- | Repair the refrigerant leaking points. | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | 2.FILL PROPER AMOUNT OF REFRIGERANT. Drain all refrigerant, and refill proper amount of refrigerant. • Recovery: Refrigerant Recovery Procedure > PROCEDURE • Fill: Refrigerant Charging Procedure > PROCEDURE | Is refrigerant pressure within the standard value- | Refrigerant pressure is normal. | Inspect the compressor. Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON |
5. HIGH-PRESSURE SIDE IS HIGH | STEP | CHECK | YES | NO | 1.CHECK CONDENSER. Check the condenser. Condenser > INSPECTION | | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | Clean or replace the condenser. | 2.CHECK RADIATOR FAN. Check the radiator fan system. • H4 model: Radiator Fan System • H6 model: Radiator Fan System | Is radiator fan system normal- | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | Repair the radiator fan system or replace the faulty parts. | 3.FILL PROPER AMOUNT OF REFRIGERANT. Drain all refrigerant, and refill proper amount of refrigerant. • Recovery: Refrigerant Recovery Procedure > PROCEDURE • Fill: Refrigerant Charging Procedure > PROCEDURE | Is refrigerant pressure within the standard value- | Refrigerant pressure is normal. | Check the high-pressure hose and condenser for kinks or clogging, and replace if defective. |
6. LOW-PRESSURE SIDE IS LOW | STEP | CHECK | YES | NO | 1.CHECK REFRIGERANT LEAKS. Check the refrigerant for leaks. Refrigerant Leak Check > INSPECTION NOTE: When high-pressure side is less than 0.69Mpa: Go to step 2. | Are there refrigerant leaks- | Repair the refrigerant leaking points. | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | 2.FILL PROPER AMOUNT OF REFRIGERANT. Drain all refrigerant, and refill proper amount of refrigerant. • Recovery: Refrigerant Recovery Procedure > PROCEDURE • Fill: Refrigerant Charging Procedure > PROCEDURE | Is refrigerant pressure within the standard value- | Refrigerant pressure is normal. | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | 3.REPLACE EXPANSION VALVE. Replace the expansion valve. Expansion Valve > REMOVAL | Is refrigerant pressure within the standard value- | Refrigerant pressure is normal. | Inspect the compressor. Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON |
7. LOW-PRESSURE SIDE IS HIGH | STEP | CHECK | YES | NO | 1.FILL PROPER AMOUNT OF REFRIGERANT. Drain all refrigerant, and refill proper amount of refrigerant. • Recovery: Refrigerant Recovery Procedure > PROCEDURE • Fill: Refrigerant Charging Procedure > PROCEDURE | Is refrigerant pressure within the standard value- | Refrigerant pressure is normal. | Refrigerant Pressure with Manifold Gauge Set > INSPECTION | 2.REPLACE EXPANSION VALVE. Replace the expansion valve. Expansion Valve > REMOVAL | Is refrigerant pressure within the standard value- | Refrigerant pressure is normal. | Replace the evaporator. Evaporator > REMOVAL |
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Procedure
Relay and fuse