Correcting After Abnormal Completion Of The Test Run; Operating The Unit; Troubleshooting; Solving Problems Based On Error Codes - Daikin LRLEQ3BY1 Installation And Operation Manual

7.3.3 Correcting after abnormal completion of
the test run
The test operation is only completed if no malfunction occurs. In
case of a malfunction, perform correcting actions as explained in the
error code table (see "8.1.2 Error codes: Overview" on page
Carry out the test operation again and confirm that the abnormality is
properly corrected.
INFORMATION
When a malfunction occurs, X3M outputs a caution (C/C1)
or warning (C/W1) signal, and the H2P LED on the main
PCB lights up.
7.3.4

Operating the unit

Once the unit is installed and test operation of outdoor unit and
indoor units is finished, the operation of the system can start.
8

Troubleshooting

8.1 Solving problems based on error
codes
INFORMATION
When a malfunction occurs, X3M outputs a caution (C/C1)
or warning (C/W1) signal, and the H2P LED on the main
PCB lights up.
You can display the error codes of the 3 latest malfunctions by using
the push buttons and 7‑LEDs display (see
components" on page 23). Error codes consist of 2 characters
(example: E3).
After solving the problem, reset the malfunction by turning OFF and
ON the operation switch, and retry operation.
8.1.1 To display the error codes of the latest
malfunctions
# Action
1 Start from the default
situation.
8.1.2

Error codes: Overview

Code Description
Abnormally high pressure level
Inverter compressor motor lock
Outdoor unit fan motor
malfunction
Electronic expansion valve
abnormality
Abnormal discharge pipe
temperature
LRMEQ+LRLEQ3+4BY1
Air-cooled refrigeration condensing unit
4P545024-1 – 2018.09
"6.1.3 Field setting
Display
Criteria
High pressure switch ≥4.0 MPa (40 bar)
High pressure sensor ≥3.55 MPa (35.5 bar)
Position signal error
Irregular revolution of 1 fan motor
Irregular revolution of 2 fan motors
No continuity of electronic expansion valve
coil
Discharge pipe temperature >150°C
▪ Discharge pipe temperature >120°C
continuously for 70 seconds or more
▪ Discharge pipe temperature >125°C
continuously for 30 seconds or more
▪ Discharge pipe temperature >130°C
Discharge pipe temperature >110°C AND
Y1E ≥450 pls, continuously for 60 seconds
# Action
2 Select mode 1.
3 Select a malfunction.
27).
("X×" depends on the
setting that you want
to select.)
4 Display the first
character of the error
code.
5 Display the second
character of the error
code.
6 Quit mode 1.
Times of Output signal
retry
0 Warning ▪ The stop valves are closed
▪ Excessive refrigerant charge
3 Warning
4 Warning ▪ The stop valves are closed
▪ Incorrect wiring
4 Caution Fan motor malfunction:
▪ M1F - A2P (X106A)
4 Warning
▪ M2F - A2P (X107A)
0 Warning Electronic expansion valve malfunction:
Y1E - A1P (X21A)
0 Warning ▪ Refrigerant shortage
▪ Defective discharge thermistor or
14 Warning
outdoor unit PCB
▪ Clogging of expansion valve for
injection
1 Caution
3 Warning
8 Troubleshooting
Display
BS1
[1×]
BS2 Possible malfunctions:
[X×]
[1‑14] Latest malfunction:
[1‑15] 2nd last malfunction:
[1‑16] 3rd last malfunction:
BS3 Possible characters:
[1×]
E:
H:
F:
J:
L:
P:
U:
BS2 Possible characters:
[1×]
1:
2:
3:
4:
5:
6:
7:
8:
9:
A:
C:
BS1
[1×]
Cause Solution
▪ Open the gas and liquid stop valves
▪ Recalculate the additional refrigerant
charge and recover any excessive
refrigerant with a refrigerant recovery
machine
▪ Open the gas and liquid stop valves
▪ Ensure correct
▪ Phase order
▪ Wiring
Check actuator, or connection on PCB
Check actuator, or connection on PCB
▪ Charge additional refrigerant
▪ Replace defective component
▪ Repair clogging
Installation and operation manual
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