Actuation Of High Pressure Switch - Daikin Super Multi Plus D-Series Service Manual

SiEBE18-526
7.2

Actuation of High Pressure Switch

E3
Remote
Controller
Display
Applicable
AII outdoor unit models
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
Decision mode.
Conditions
Supposed
Causes
Troubleshooting
H1: Actuation of high pressure switch (HPS)
• Is the outdoor unit heat exchanger dirty?
• Defect of outdoor fan
• Is the refrigerant over-charged?
• Faulty high pressure sensor
Troubleshooting
Actuation of outdoor unit high pressure switch
Defect of High pressure switch
Defect of outdoor unit PCB
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
PCB (A2P)?
H1
YES
Contact S1PH is open.
NO
Operation
is normal when turned
on again by remote
control.
NO
NO
YES
YES
Troubleshooting for Outdoor Unit
Connect the connector and
operate again.

Actuation of high pressure switch.

H1
There was an instantaneous
power failure or a past safety
device actuated.
Re-check refrigerant system.
Replace outdoor unit PCB A2P.
(Q0422)
295