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Troubleshooting
Installer and user reference guide
157
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
Main code
Contents
Autocharge operation related
Fin thermistor malfunction
Autocharge operation related
Autocharge operation related
Autocharge operation related
Capacity setting malfunction (outdoor)
Abnormal low pressure drop, faulty expansion valve
Reversed power supply phase malfunction
INV voltage power shortage
System test run not yet executed
Faulty wiring indoor/outdoor
Abnormal user interface - indoor communication
Faulty wiring to outdoor/outdoor
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
Centralised address duplication
Malfunction in communication centralised control device - indoor
unit
Auto address malfunction (inconsistency)
Auto address malfunction (inconsistency)
19.2 Symptoms that are NOT system malfunctions
The following symptoms are NOT system malfunctions:
19.2.1 Symptom: The system does not operate
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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.
Summary of Contents for VRV IV+
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