Daikin VRV 5-S Series Installation And Operation Manual page 20

8 Troubleshooting
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
8.1 Error codes: Overview
In case a malfunction code appears on the indoor unit user interface
display, contact your installer and inform the malfunction code, the
unit type, and serial number (you can find this information on the
nameplate of the unit).
For your reference, a list with malfunction codes is provided. You
can, depending on the level of the malfunction code, reset the code
by pushing the ON/OFF button. If not, ask your installer for advice.
Main code
External protection device was activated
The R32 sensor in one of the indoor units has
detected a refrigerant leak
/ Safety system error (leak detection)
EEPROM failure (indoor)
Drain system malfunction (indoor)
Fan motor malfunction (indoor)
Swing flap motor malfunction (indoor)
Expansion valve malfunction (indoor)
Drain malfunction (indoor unit)
Filter dust chamber malfunction (indoor)
Capacity setting malfunction (indoor)
Transmission malfunction between main PCB and sub
PCB (indoor)
Heat exchanger thermistor malfunction (indoor; liquid)
Heat exchanger thermistor malfunction (indoor; gas)
Suction air thermistor malfunction (indoor)
Discharge air thermistor malfunction (indoor)
Movement detector or floor temperature sensor
malfunction (indoor)
R32 sensor malfunction in one of the indoor units
R32 sensor end of lifetime in one of the indoor units
User interface thermistor malfunction (indoor)
PCB malfunction (outdoor)
High pressure switch was activated
Low pressure malfunction (outdoor)
Compressor lock detection (outdoor)
Fan motor malfunction (outdoor)
Electronic expansion valve malfunction (outdoor)
Discharge temperature malfunction (outdoor)
Abnormal suction temperature (outdoor)
Refrigerant overcharge detection
High pressure switch malfunction
Fan motor trouble (outdoor)
Ambient temperature sensor malfunction (outdoor)
Pressure sensor malfunction
Current sensor malfunction
Discharge temperature sensor malfunction (outdoor)
Suction temperature sensor malfunction (outdoor)
De-icing temperature sensor malfunction (outdoor)
Liquid temperature sensor (after subcool HE)
malfunction (outdoor)
Gas temperature sensor (after subcool HE)
malfunction (outdoor)
Installation and operation manual
20
Contents
(a)
(a)
(a)
(a)
Main code
High pressure sensor malfunction (S1NPH)
Low pressure sensor malfunction (S1NPL)
INV PCB abnormal
Fin temperature abnormal
Inverter PCB faulty
Compressor over current detected
Compressor lock (startup)
Shut-off PCB transmission trouble or disconnection
INV unbalanced power supply voltage
Fin thermistor malfunction
Capacity setting malfunction (outdoor)
Abnormal low pressure drop, faulty expansion valve
INV voltage power shortage
System test run not yet executed
Faulty wiring indoor/outdoor
Abnormal user interface - indoor communication
Abnormal main-sub user interface communication
System mismatch. Wrong type of indoor units
combined. Indoor unit malfunction.
Connection malfunction over indoor units or type
mismatch
System lock
Back-up PCB error
External ventilation input error
Centralised address duplication
Malfunction in communication centralised control
device - indoor unit
Auto address malfunction (inconsistency)
Auto address malfunction (inconsistency)
(a)
The error code is only shown on the user interface of the indoor
unit where the error occurs.
8.2 Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
8.2.1 Symptom: The system does not operate
▪ The air conditioner does not start immediately after the ON/OFF
button on the user interface is pressed. If the operation lamp
lights, the system is in normal condition. To prevent overloading of
the compressor motor, the air conditioner starts 5 minutes after it
is turned ON again in case it was turned OFF just before. The
same starting delay occurs after the operation mode selector
button was used.
▪ If "Under Centralized Control" is displayed on the user interface,
pressing the operation button causes the display to blink for a few
seconds. The blinking display indicates that the user interface
cannot be used.
▪ The system does not start immediately after the power supply is
turned on. Wait one minute until the micro computer is prepared
for operation.
8.2.2 Symptom: Cool/Heat cannot be changed
over
▪ When the display shows
control), it shows that this is a slave user interface.
Contents
(change-over under centralized
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1A – 2020.01