Daikin LX10F11B Service Manual page 61

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019 E413
（LPT）
Alarm 〈E413〉LPT≦-110 kPa with 3 minutes elapse or ≧1420 kPa with 3 minutes elapse
Logic 〈E415〉HPT≦-340 kPa with 3 minutes elapse or ≧4260 kPa with 3 minutes elapse
Possible 1. Faulty contact of connector X7A (CPU board)
Causes 2. Pressure transducer failure
3. Controller failure
Trouble Step 1. Check connector X7A and make sure it is properly installed.
Shooting
Step 2-1. Connect manifold gauges and compare the value of pressure gauge and HPT value
in LCD display.
Replace HPT if the difference is greater than 50 kPa.
Step 2-2. Connect manifold gauges and compare the value of pressure gauge and LPT value
in LCD display.
Replace LPT if the difference is greater than 10 kPa.
Step 3. Turn on the circuit breaker and check if there is DC5V input from the controller.
X7A
CPU board
Sensor
name
HPT
LPT
If input DC 5V is not present, check the controller.
If input DC 5V is present, replace the pressure transducer.
Controller E413 Backup operation
Action E415 Backup operation
・ E415
（HPT）
Black – Red
Black – White
V
DC5V
6
5
4
3
V
DC5V
2
1
Pin No.
(Connector X7A)
1 3 DC 5V
2 3 Refer to 5.3 Pressure Sensor Characteristics
4 6 DC 5V
5 6 Refer to 5.3 Pressure Sensor Characteristics
2-33
：Input voltage DC5V
：Output voltage
Black
White
Red
Black
White
Red
Voltage value
Example of voltage check
(Connector X7A)
LPT
HPT