157
Error Codes
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ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. 35
Error No. Description Details Causes
35
Master: 351
Slave 1: 352
Slave 2: 353
Outdoor unit low
side pressure
transducer senses
pressure below
allowable limits.
System shut off
because of an
excessive decrease
in pressure at the
outdoor unit that
occurred three con-
secutive times.
1. Shut down occurs when the sum of all compressors inverter frequency
<30Hz = low <110 kPa (15.95 psi) for 1 minute.
2. When operating in cooling mode: Low side pressure <400 kPa (58.02
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.
3. When operating in heating mode: Low side pressure <230 kPa (33.36
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.
4. Defective low pressure sensor.
5. Defective indoor unit or outdoor unit fan.
6. Refrigerant piping is damaged.
7. The outdoor unit is blocked (dirty coil) in heating, and/or the indoor
unit filter is blocked (plugged) in cooling.
8. Service valve is clogged.
9. Defective outdoor unit PCB.
10. Defective indoor unit pipe temperature sensor.
Is the service
valve open?
Open the service valve.
Are the communication cable /
piping installed correctly?
Yes
No
Is the refrigerant amount
appropriate for the system?
Yes
No
Is the fan operating
correctly (heating: outdoor fan,
cooling: indoor fan).
Yes
Add or subtract the amount
of refrigerant.
Check and repair communication /
piping connections / installation.
Check and replace components.
Is the strainer clogged*
No
Clean or replace the strainer.
No
Replace the low pressure sensor.
Yes
Yes
Yes
No
Has the ppiping been
damaged and / or is there a
refrigerant leak?
No
Yes
* 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.
Is the value of the low
pressure sensor the same
as the manifold value?
Check indoor unit EEV, outdoor
unit EEV, indoor unit PCB, and
indoor / outdoor unit installation.
Fix the leak and / or damaged
piping and recharge the
refrigerant.
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