Vaillant VA 6-050 MXNHDI, Руководство по установке, Страница: 38 / 41

Multi Split Type Installation Manual
37 EN
Error Codes 16
16.4 Outdoor units
Failure Code State of LED
5-4-3-2-1 Trouble Shooting Possible Reasons
1

Faulty defrost sensor Te Sensor disconnected, or broken, or short circuit
2

Faulty defrost sensor Tao T T Sensor disconnected, or broken, or short circuit
3

Faulty defrost sensor Ts T T Sensor disconnected, or broken, or short circuit
4

Faulty sensor Td Sensor disconnected, or broken, or short circuit
5

Input Overcurrent Over current of the system, or broken of the
current sensor, or malfunction with indoor or
outdoor fan motors, or faulty PCB
6

Abnormal communication
between indoor and outdo-
or units Wrong connection, or the wires be disconnected or
wrong address setting of indoor units, or faulty
PCB, or faulty power supply
9

System high pressure pro-
tection High pressure switch is disconnected, or high pres-
sure switch worked, or Tc too high and faulty indo-
or fan motors when heating, or refrigerant over-
abundance
10

System low pressure pro-
tection Low pressure switch is disconnected, or low pres-
sure switch worked, or Te too low and faulty outdo-
or fan motors when heating, or faulty indoor fan
motor when cooling, or refrigerant shortage.
11

IPM protection IPM over current, or short circuit, or IPM tempera-
ture too high, or IPM input voltage too low, or faul-
ty SPDU (or ISPM).
12

EEPROM fault Faulty outdoor unit PCB
13

Over hot protection of com-
pressor Serious lack of refrigerant of the system, or the
ambient temperature too high, or PMVs be blocked
14

Over hot protection of
SPDU (or ISPM) Ambient temperature too high, or outdoor fan be
blocked, or bad air circulation of outdoor unit
15

DC fan motor fault Fan is blocked, or the terminal is disconnected
from the PCB
16

Faulty 4-way valve switching on Coil of 4-way valve is disconnected, or faulty outdo-
or PCB
17

Faulty sensor Tc Sensor disconnected, or broken, or short circuit
21

Faulty sensor Toci T T Sensor disconnected, or broken, or short circuit
23

Low voltage protection VDC<194V, too low voltage from power source