Activation Of High Pressure Switch - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

Troubleshooting by Error Code

4.20 Activation of High Pressure Switch

E3
Error Code
Applicable
All outdoor units
Models
Method of Error Abnormality is detected when the contact of the high pressure protection switch opens.
Detection Use the protection device circuit to test high pressure switch conduction.
Error Decision Error is generated when the high pressure switch activation count reaches the number specific to
Conditions the operation mode.
When part of the protection device has an open circuit
Reference: Operating pressure of high pressure switch
Supposed
Causes
167
Operating pressure: 4.0 MPa (580 psi)
Reset pressure: 3.0 MPa (435 psi)
Activation of outdoor unit high pressure switch
Defective high pressure switch
Defective outdoor main PCB
Instantaneous power failure
Defective high pressure sensor
SiUS331604E
Service Diagnosis