SiUS341802EC
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
Causes
Defective high pressure switch
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 normal
switch (S1PH).
(4.0 MPa
(580 psi))?
YES
Troubleshooting by Error Code
286