Actuation Of High Pressure Switch - Daikin Aurora Series Service Manual

SiUS341802E

2.29 Actuation of High Pressure Switch

E3
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect continuity across the high pressure switch in the protection device circuit.
Detection
Error Decision When part of the protection device circuit opens.
Conditions (Reference) Operating pressure of the high pressure switch:
Supposed
Causes
Troubleshooting
Service Diagnosis
Operating pressure: 4.0 MPa (580 psi)
Resetting pressure: 3.0 MPa (435 psi)
Activation of high pressure switch
Defective high pressure switch
Defective outdoor unit main PCB (A1P)
Momentary power failure
Defective high pressure sensor
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check for the following 3 points:
(1) Is the stop valve open?
(2) Is the high pressure switch connector
properly connected to the outdoor unit main
PCB?
(3) Is there continuity across the high pressure
switch?
Are the
above 3 points
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.
Does the error E3
recur?
NO
Are the
characteristics of
the high pressure
sensor normal?
(∗1)
YES
A Go to the next page.
NO
Is the
operating
pressure of the high
YES
pressure switch normal
(4.0 MPa
(580 psi))?
YES
NO
Troubleshooting by Error Code
Remedy defective points.
NO
Replace the high pressure
switch (S1PH).
Replace the high pressure sensor
(S1NPH).
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