E3" Outdoor Unit: Actuation Of High Pressure Switch - Daikin REYQ72 Serveice Manual

SiUS39-602
2.14 " E3 " Outdoor Unit:
E3
Remote
Controller
Display
Applicable REYQ72M, 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
★
1: Actuation of high pressure switch (HPS)
• 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
Troubleshooting
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.
YES
Contact
S1PH or S2PH
is open.
NO
Operation
is normal when turned
on again by remote
controller.
NO
Troubleshooting by Indication on the Remote Controller
NO
YES
YES
Connect the connector and
operate again.
There was an instantaneous
power failure or a past safety
device actuated. Re-check
refrigerant system.
Replace outdoor unit PC board
(A1P).
(V3065)
143