Activation Of High Pressure Switch - Daikin VRV S RXQ4/5ARV1 Service Manual

SiAF332111E

5.25 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
CHECK 12
Compare the voltage
measurement of the connector
NO
of the pressure sensor ( 1) with the
measurement of the pressure gauge.
Are the characteristics
of the high pressure
sensor normal? ( 1) Use the table on CHECK 12
to convert the voltage measurement
into pressure measurement.
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. (S1PH)
normal
(4.0 MPa)?
YES
Replace the high pressure sensor
(S1NPH).
Troubleshooting by Error Code
233