Daikin LX10F10A, Service Manual

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2-33
019 E413
（ LPT ）
・
E415
（ HPT ）
Alarm
Logic
〈 E413 〉≦ -110 kPa with 3 minutes elapse or ≧ 1420 kPa with 3 minutes elapse
〈 E415 〉≦ -340 kPa with 3 minutes elapse or ≧ 4260 kPa with 3 minutes elapse
Possible
Causes
1. Faulty contact of connector X7A (CPU board)
2. Pressure transducer failure
3. Controller failure
Trouble
Shooting
1. Check if the connector X7A (CPU board) is inserted
securely.
1. If alarm is still generated, procced
to next step.
1-1. Connect the gauge manifold and compare the
pressure in high pressue gauge and HPT value in
LCD display (left below).
1-2. Connect the gauge manifold and compare the
pressure in low pressue gauge and LPT value in LCD
display (right below).
1-1. If the pressure difference of high
pressure is within 50kPa, HPT
is normal.
1-2. If the pressure difference of low
presuure is within 10kPa, LPT is
normal.
3. Disconnect the connector X7A and check if there is
input 5V from controller
LPT ： Connector X7A pin No.4-6 （ Red-Black ）
HPT ： Connector X7A pin No.1-3 （ Red-Black ）
3. If there is no input 5V, then check
the controller
If there is input 5V, then check the
transducer.
X7A
V
V
CPU board
B–R : Input voltage 5V
B–W : Output voltage
5V
5V
LPT
Black
Red
White
HPT
Black
Red
White
6
4
2
5
3
1
Controller
Action
E413 Backup operation
E415 Backup operation