E3" Outdoor Unit: Actuation Of High Pressure Switch; Actuation Of High Pressure Switch - Daikin RXYQ72 Serivce Manual

Troubleshooting by Indication on the Remote Controller
2.14 "E3" Outdoor Unit:
E3
Remote
Controller
Display
Applicable RXYQ72M, 96M
Models
Method of Abnormality is detected when the contact of the high pressure protection switch opens.
Malfunction
Detection
Malfunction Error is generated when the HPS activation count reaches the number specific to the operation
mode.
Decision
Conditions
Supposed
Causes
Troubleshooting
★
• The outdoor unit PC board's connector is disconnected.
• Is the outdoor unit heat exchanger dirty?
• Defect of outdoor fan
• Is the refrigerant over-charged?
• Faulty high pressure sensor
136

Actuation of High Pressure Switch

Actuation of outdoor unit high pressure switch
Defect of High pressure switch
Defect of outdoor unit PC board
Instantaneous power failure
Faulty high pressure sensor
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Are the HPS
connectors connected
to the outdoor main
P.C.Board?
1
YES
Contact
S1PH or S2PH
is open.
NO
Operation
is normal when turned
on again by remote
controller.
NO
1: Actuation of high pressure switch (HPS)
NO
YES
YES
SiUS39-601
Connect the connector and
operate again.
Actuation of high pressure switch.
1
There was an instantaneous
power failure or a past safety
device actuated. Re-check
refrigerant system.
Replace outdoor unit PC board
(A1P).
(V3065)
Troubleshooting