Error No. 35 - LG Multi V5 Service Manual

Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Error No. Description
35
Outdoor unit low
side pressure
Master: 351 transducer senses
pressure below
Slave 1: 352
allowable limits.
Slave 2: 353
Is the service
valve open?
Yes
Are the communication cable /
piping installed correctly?
Yes
Is the refrigerant amount
appropriate for the system?
Yes
Is the fan operating
correctly (heating: outdoor fan,
cooling: indoor fan).
Yes
Is the strainer clogged*
Yes
Is the value of the low
pressure sensor the same
as the manifold value?
Yes
Check indoor unit EEV, outdoor
unit EEV, indoor unit PCB, and
indoor / outdoor unit installation.
Details
1. Shut down occurs when the sum of all compressors inverter frequency
2. When operating in cooling mode: Low side pressure <400 kPa (58.02
3. When operating in heating mode: Low side pressure <230 kPa (33.36
System shut off
because of an
excessive decrease
in pressure at the
4. Defective low pressure sensor.
outdoor unit that
5. Defective indoor unit or outdoor unit fan.
occurred three con-
6. Refrigerant piping is damaged.
secutive times.
7. The outdoor unit is blocked (dirty coil) in heating, and/or the indoor
8. Service valve is clogged.
9. Defective outdoor unit PCB.
10. Defective indoor unit pipe temperature sensor.
Open the service valve.
No
Check and repair communication /
piping connections / installation.
Has the ppiping been
No
damaged and / or is there a
refrigerant leak?
Yes
Fix the leak and / or damaged
piping and recharge the
refrigerant.
No
Check and replace components.
No
Clean or replace the strainer.
No
Replace the low pressure sensor.
* If the temperature difference between the inlet and outlet of the strainer
is so large that frost or ice can be seen, then check for clogs.
If ice has not fully formed on the strainer, then the clog is located near
the outlet, not at the inlet.
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
<30Hz = low <110 kPa (15.95 psi) for 1 minute.
psi) for 1 minute; High side pressure is <2,200 kPa (319.08 psi).
Check for refrigerant leaks (low refrigerant charge), or a defective
indoor unit EEV.
psi) for 1 minute; High side pressure is <1,800 kPa (261.07 psi).
Check for refrigerant leaks (low refrigerant charge), or a defective
outdoor unit EEV.
unit filter is blocked (plugged) in cooling.
No
Add or subtract the amount
of refrigerant.
ERROR CODES

Error No. 35

Causes
157