Daikin LRMEQ3BY1, Инструкция по установке и эксплуатации, Страница: 34 / 44

11 Troubleshooting
Installer and user reference guide
34
LRMEQ+4BY1
Air-cooled refrigeration condensing unit
4P500362-1A – 2018.09
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
DANGER: RISK OF BURNING
11.3 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
"7.2.3 Field setting
components" on page 28 ). 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.
11.3.1 To display the error codes of the latest
malfunctions
# Action Display
1 Start from the default
situation.
2 Select mode 1. BS1
[1×]
# Action Display
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×]
11.3.2 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
Wet operation from refrigeration
suction pipe Suction superheat <5 K AND discharge
superheat <15 K AND discharge temperature
<60°C, continuously for 10 minutes 0 Caution ▪ Excessive frost formation on indoor
side
▪ Wrong selection of expansion valves
▪ Adjust defrost cycle
▪ Select the correct type of expansion
valve
In addition to above conditions (for caution):
discharge superheat <15 K for 6 hours 0 Warning
Wet operation from injection pipe Suction superheat ≥5 K AND discharge
superheat <15 K AND discharge temperature
<60°C, continuously for 90 minutes 0 Caution ▪ Defective expansion valve, suction pipe
thermistor, or subcool heat exchanger
outlet thermistor
▪ Refrigerant overcharge
▪ Replace defective component
▪ Adjust refrigerant charge
In addition to above conditions (for caution):
discharge superheat <15 K for 6 hours 0 Warning