- 72 -
Error number
Errors
Meaning
Main cause of occurrence
35
(351)
Excessive drop of
discharge pres-
sure of compres-
sor
Error happens because of 3
times successive compres-
sor off due to excessive
drop of low pressure by the
low pressure sensor
1. Defective low pressure sensor
2. Defective outdoor/indoor unit fan
3. Refrigerant shortage/leakage
4. Deformation because of damage of refrigerant pipe
5. Defective indoor / outdoor unit EEV
6. Covering / clogging (outdoor unit covering during the
cooling mode/ indoor unit filter clogging during heating
mode)
7. SVC valve clogging
8. Defective outdoor unit PCB
9. Defective indoor unit pipe sensor
n
Failure diagnosis method
Are communication cable/
piping normal?
No
Is amount of refrigerant
normal?
[refer refrigerant part]
Yes
No
Is fan normal?
(in heating outdoor fan,
in cooling indoor fan)
Yes
Adjust the amount of
refrigerant (Additive charge)
check communication/
piping correction.
Check and replace related parts
Is strainer Ok?*
No
Replace the strainer
No
Replace the pressure sensor
Yes
Yes
EEV check / PCB check /
Installation environment check
Yes
Are the values of manifold
and low pressure sensor same?
( Is the low pressure value
actually low?)
No
Is there pipe crack or trace
of refrigerant leakage?
Weld / reconnect the cracked
portion and recharge refrigerant
No
Yes
[Note 1]
If freezing is confirmed visibly due to a severe temperature difference
between the front and the rear of a strainer or the temperature difference is con-
firmed, strainer clogging should be doubted. (Warning: Doubting in case where freez-
ing on the front of the strainer is removed and then the freezing is occurred all the
sudden by passing around, not the whole freezing
Error code check
