10
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Troubleshooting
Installer and user reference guide
43
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
10.2.12 Symptom: Dust comes out of the unit
When the unit is used for the first time in a long time. This is because dust has
gotten into the unit.
10.2.13 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it
again.
10.2.14 Symptom: The outdoor unit fan does not spin
During operation. The speed of the fan is controlled in order to optimise product
operation.
10.2.15 Symptom: The display shows "88"
This is the case immediately after the main power supply switch is turned on and
means that the user interface is in normal condition. This continues for 1 minute.
10.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating
operation
This is to prevent refrigerant from remaining in the compressor. The unit will stop
after 5 to 10 minutes.
10.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped
This is because the crankcase heater is warming the compressor so that the
compressor can start smoothly.
10.2.18 Symptom: Hot air can be felt when the indoor unit is stopped
Several different indoor units are being run on the same system. When another
unit is running, some refrigerant will still flow through the unit.
