Activation Of High Pressure Switch - Daikin RXQ12AHR Service Manual

SiAF341904E

5.23 Activation of High Pressure Switch

Applicable All outdoor unit models
Models
E3
Error Code
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:
 Operating pressure: 4.0 MPa
 Resetting pressure: 3.0 MPa
Supposed
 Activation of high pressure switch
Causes  Defective high pressure switch
 Defective outdoor unit main PCB
 Momentary power failure
 Defective high pressure sensor
Troubleshooting
Part 6 Service Diagnosis
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
NO
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.
YES
Does the error E3
recur?
NO
Are the
characteristics of
NO
the high pressure sensor
normal? (∗1)
YES
A
Go to the next page
Remedy defective points.
Is the
operating
pressure of the NO
Replace the high pressure
high pressure switch
switch.
normal
RXQ6-14A: S1PH
(4.0 MPa)?
RXQ16-20A: S1PH, S2PH
YES
Replace the high pressure sensor
(S1NPH).
Troubleshooting by Error Code
219