Daikin SkyAir RZR-TA Series Service Manual page 260

Troubleshooting by Error Codes
Troubleshooting
Reference
CHECK 1 Refer to page 292.
Reference
CHECK 12 Refer to page 304.
254
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
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?
NO
Are the three points
above OK?
YES
(1) Mount a pressure gauge on the high pressure
service port.
(2) Reset the operation using the remote controller,
and then restart the operation.
YES
Does the abnormal
stop E3 recur?
NO
CHECK 12
Compare the voltage
measurement of the
connector of the pressure sensor
NO
(∗1) with the measurement of the
pressure gauge. Are the
( 1) Use the table on
characteristics of the high
pressure sensor
the voltage measurement into pressure
normal?
measurement.
YES
Service Checker
CHECK 12
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)
Are both
NO
pressure values
the same?
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.
Rectify the defective points,
if any.
Is the
high pressure
NO
switch operating value
Replace the high pressure switch.
normal (4.0 MPa
(580 psi))?
YES
Replace the high pressure sensor.
CHECK 12
to convert
Replace the outdoor unit
main PCB (A1P).
SiUS281811EA
Part 6 Service Diagnosis