Daikin VRV II RXYQ5MATL, Service Manual

Page: 197 / 331

Troubleshooting by Indication on the Remote Controller Si39-504
186 Troubleshooting
3.14
“
E3
”
Outdoor Unit: Actuation of High Pressure Switch
Remote
Controller
Display
E3
Applicable
Models RXYQ5MA~48MA
Method of
Malfunction
Detection Abnormality is detected when the contact of the high pressure protection switch opens.
Malfunction
Decision
Conditions Error is generated when the HPS activation count reaches the number specific to the operation
mode.
Supposed
Causes
„
Actuation of outdoor unit high pressure switch
„
Defect of High pressure switch
„
Defect of outdoor unit PC board (A1P)
„
Instantaneous power failure
„
Faulty high pressure sensor
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
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Operation
is normal when turned
on again by remote
controller.
Replace outdoor unit PC board
(A1P).
Actuation of high pressure switch.
H
1
YES
YES
There was an instantaneous
power failure or a past safety
device actuated. Re-check
refrigerant system.
NO
NO
(V3065)
Contact
S1PH or S2PH
is open.
Connect the connector and
operate again.
NO
YES
Are the HPS
connectors connected
to the outdoor main
P.C. Board?
H
1