Actuation Of High Pressure Switch Or Pressure Switch - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

SiBE341027
2.3

Actuation of High Pressure Switch or Pressure Switch

E2
Remote
Controller
Display
Applicable RQYQ-PY1B
Models
Method of Error The error is detected by the relationship between "pressure detected by the high pressure
sensor" and "operation of the high pressure switch or pressure switch".
Detection
Error Decision When the high pressure switch or pressure switch operates under low pressure detected by the
high pressure sensor during compressor operation.
Conditions
Operating pressure of high pressure switch: 4.0MPa
Operating pressure of pressure switch: 3.3MPa
Supposed
Causes
Troubleshooting
Service Diagnosis
Defective high pressure sensor
Defective connection of connector for high pressure switch or pressure switch
Defective high pressure switch or pressure switch
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check the outdoor unit in the
monitor mode.
Are the
characteristics of the
high pressure sensor
normal?
YES
Is the connector
connection on
PCB concerned
normal?
YES
Are there continuity
at the high pressure
switch and pressure
switch?
YES
NO
NO
NO
Troubleshooting by Remote Controller
Replace the high pressure
sensor.
Connect the connector
correctly.
Replace the high pressure
switch and/or pressure
switch.
Replace the main PCB
(A1P) of the unit concerned.
105