Activation Of High Pressure Switch - Daikin VRV EMERION RXYQ-AATJA Service Manual

SiUS342303E

3.35 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 (580 psi)
 Resetting pressure: 3.0 MPa (435 psi)
Supposed
 Activation of high pressure switch
 Defective high pressure switch
Causes
 Defective outdoor unit main PCB (A1P)
 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
A
Go to the next page.
Remedy defective points.
Is the
operating
NO
pressure of the high
Replace the high pressure
pressure switch
switch (S1PH, S2PH).
normal (4.0 MPa
(580 psi))?
YES
Troubleshooting by Error Code
302