Solving Problems Based On Led Behaviour; Location Of The Outdoor Unit Led; To Diagnose Faults; Solving Problems Based On Error Codes - Daikin Altherma EJHA04AAV3 Installer's Reference Manual

15 Troubleshooting
15.5 Solving problems based on LED
behaviour
15.5.1

Location of the outdoor unit LED

Open the outdoor unit (see "9.2.2 To open the outdoor unit" on
page 30). The following illustration indicates the location of the
outdoor unit LED on the PCB:
15.5.2

To diagnose faults

LED behaviour
Diagnosis
LED flashing Normal
(a)
LED on
LED off Case 1: supply voltage (for power saving)
Case 2: power supply fault
(a)
Case 3
(a) Follow the procedure below.
Check if the outdoor unit is faulty
1 Turn the power off and on again.
2 Check the LED within approximately 3 minutes.
If the LED behaviour recurs, the outdoor unit PCB is faulty.
Note: Error detection should be done by using the remote control
fault diagnosis.
15.6 Solving problems based on error
codes
When a problem happens, an error code appears on the user
interface. It is important to understand the problem and to take
measures before resetting an error code. This should be done by a
licensed installer or by your local dealer.
This chapter gives you an overview of all error codes and the
content of the error code as it appears on the user interface.
For a more detailed troubleshooting guideline for each error, please
see the service manual.
Installer reference guide
90
15.6.1
Error codes of the outdoor unit
Refrigerant part
PCB
LED A

Error codes: Overview

Error code Detailed error
code
A5 00
E1 00
E3 00
E5 00
E6 00
E7 00
E8 00
EA 00
H0 00
H3 00
H6 00
H8 00
H9 00
F3 00
F6 00
Daikin Altherma Hybrid hydrosplit heat pump
Description
OU: High pressure cooling/Peak
cut/ freeze protection problem.
Please contact your dealer.
OU: PCB defect.
Power reset required.
Please contact your dealer.
OU: Actuation of high pressure
switch (HPS).
Please contact your dealer.
OU: Overheat of inverter
compressor motor.
Please contact your dealer.
OU: Compressor startup defect.
Please contact your dealer.
OU: Malfunction of outdoor
unit fan motor.
Please contact your dealer.
OU: Power input overvoltage.
Please contact your dealer.
OU: Cool/heat switchover
problem.
Please contact your dealer.
OU: Voltage/current sensor
problem.
Please contact your dealer.
OU: Malfunction of high
pressure switch (HPS)
Please contact your dealer.
OU: Malfunction of position
detection sensor.
Please contact your dealer.
OU: Malfunction of compressor
input (CT) system.
Please contact your dealer.
OU: Malfunction of outdoor
air thermistor.
Please contact your dealer.
OU: Malfunction of discharge
pipe temperature.
Please contact your dealer.
OU: Abnormal high pressure
in cooling.
Please contact your dealer.
EJHA04AAV3 + EHY2KOMB28+32AA
4P531180-1 – 2018.06