Daikin SkyAir FHQ24PVJU - Page 260

Troubleshooting by Error Codes SiUS281811EA
254 Part 6 Service Diagnosis
Reference
Reference
Troubleshooting
CHECK 1 Refer to page 292.
CHECK 12 Refer to page 304.
NO
YES
YES
YES
NO
Is the
high pressure
switch operating value
normal (4.0 MPa
(580 psi))?
NO
Are the three points
above OK?
Rectify the defective points,
if any.
(1) Mount a pressure gauge on the high pressure
service port.
(2)
Reset the operation using the remote controller,
and then restart the operation.
Does the abnormal
stop
E3 recur?
Replace the high pressure switch.
Check for the points shown below.
(1) Is the stop valve open?
(2) Is the high pressure switch connector properly
connected to the main PCB?
(3) Does the high pressure switch have continuity?
Compare the voltage
measurement of the
connector of the pressure sensor
(∗1) with the measurement of the
pressure gauge. Are the
characteristics of the high
pressure sensor
normal?
CHECK 12
Are both
pressure values
the same?
(1) Use the table on to convert
the voltage measurement into pressure
measurement.
Replace the outdoor unit
main PCB (A1P).
NO
YES
-The high pressure sensor is normal, and outdoor unit main PCB is also normal.
-The high pressure has really become high.
CHECK 1
: Eliminate factors that cause the high pressure to rise.
Connect the service checker, and then compare the high pressure value
measured by the service checker with the voltage measurement of the
connector of the pressure sensor (∗1)
Service Checker
CHECK 12
CHECK 12
Replace the high pressure sensor.
NO
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.