Daikin LRLEQ3BY1 [27/36] Troubleshooting
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Daikin LRLEQ3BY1 [27/36] Troubleshooting

Daikin LRLEQ3BY1 [27/36] Troubleshooting
8 Troubleshooting
Installation and operation manual
27
LRMEQ+LRLEQ3+4BY1
Air-cooled refrigeration condensing unit
4P545024-1 – 2018.09
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 27).
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 "6.1.3 Field setting
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 Display
1 Start from the default
situation.
# Action Display
2 Select mode 1. BS1
[1×]
3 Select a malfunction.
("X×" depends on the
setting that you want
to select.)
BS2
[X×]
Possible malfunctions:
[1‑14] Latest malfunction:
[1‑15] 2nd last malfunction:
[1‑16] 3rd last malfunction:
4 Display the first
character of the error
code.
BS3
[1×]
Possible characters:
E:
H:
F:
J:
L:
P:
U:
5 Display the second
character of the error
code.
BS2
[1×]
Possible characters:
1:
2:
3:
4:
5:
6:
7:
8:
9:
A:
C:
6 Quit mode 1. BS1
[1×]
8.1.2 Error codes: Overview
Code Description Criteria Times of
retry
Output signal Cause Solution
Abnormally high pressure level High pressure switch ≥4.0MPa (40bar) 0 Warning
▪
The stop valves are closed
▪
Excessive refrigerant charge
▪
Open the gas and liquid stop valves
▪
Recalculate the additional refrigerant
charge and recover any excessive
refrigerant with a refrigerant recovery
machine
High pressure sensor ≥3.55MPa (35.5bar) 3 Warning
Inverter compressor motor lock Position signal error 4 Warning
▪
The stop valves are closed
▪
Incorrect wiring
▪
Open the gas and liquid stop valves
▪
Ensure correct
▪
Phase order
▪
Wiring
Outdoor unit fan motor
malfunction
Irregular revolution of 1 fan motor 4 Caution Fan motor malfunction:
▪
M1F - A2P (X106A)
▪
M2F - A2P (X107A)
Check actuator, or connection on PCB
Irregular revolution of 2 fan motors 4 Warning
Electronic expansion valve
abnormality
No continuity of electronic expansion valve
coil
0 Warning Electronic expansion valve malfunction:
Y1E - A1P (X21A)
Check actuator, or connection on PCB
Abnormal discharge pipe
temperature
Discharge pipe temperature >150°C 0 Warning
▪
Refrigerant shortage
▪
Defective discharge thermistor or
outdoor unit PCB
▪
Clogging of expansion valve for
injection
▪
Charge additional refrigerant
▪
Replace defective component
▪
Repair clogging
▪
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
14 Warning
Discharge pipe temperature >110°C AND
Y1E ≥450pls, continuously for 60 seconds
1 Caution
3 Warning

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