Daikin GYEQ20AN, Руководство по обслуживанию

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Flow Charts for Troubleshooting SiAUY361411EA
135 Troubleshooting
5
Abnormal Cooling Water Temperature
Error
code
E4
Description
of the failure
Sub-code 0: While the unit is running, the cooling water temperature rises beyond 105°C.
Sub-code 1: The cooling water temperature fails to reach 40°C within 20 minutes after the engine has started
up.
Possible
causes
of the failure
Cooling water pump failure; fan motor failure; water motor-operated valve failure; cooling water level too low;
cooling water filter clogged; radiator clogged; radiator cap faulty; thermostat failure; air extractor failure;
short circuit; cooling water temperature sensor failure; main circuit board failure; cooling water leak
Flow chart
Is Radiator
Free From Clogging?
YES
Is Unit Free From
Cooling Water Leaks?
YES
NO
Check Cooling W
NO
Check Clogging.
NO
Check Short-circuit.
ater System.
Is Unit Free From
Short Circuits?
YES
Is Cooling Water Pump
Operating Normally?
YES
NO
Check Cooling Water Pump.
Is Reservoir Tank Filled
With Cooling Water?
YES
NO
Check Cooling Water Level.
Is Fan Motor
Operating Normally?
YES
NO
Check Fan Motor.
Is the cooling water
temperature sensor
operating normally?
YES
NO
Check Radiator Cap.
Replace thermostat components.
Replace water motor valve.
Is Cooling Water Temperature
Sensor Operating Normally?
YES
NO
Check Cooling Water
Temperature Sensor.
Is Cooling Water Temperature
Operating Normally?
YES
NO
Check Cooling Water
Temperature.
025868-00EN02