Daikin RXYSQ6T8VB Installer And User Manual page 40

12 Disposal
Main code
High pressure sensor malfunction (S1NPH): open circuit /
short circuit - A1P (X17A)
Low pressure sensor malfunction (S1NPL): open circuit /
short circuit - A1P (X18A)
Transmission outdoor unit - inverter: INV1 / FAN1
transmission trouble
INV1 unbalanced power supply voltage
Reversed power supply phase malfunction
Insufficient supply voltage
Malfunction code: System test run not yet executed (system
operation not possible)
No power is supplied to the outdoor unit.
Faulty wiring to Q1/Q2
System mismatch. Wrong type of indoor units combined
(R410A, R407C, RA, etc)
Indoor unit malfunction
Improper type of indoor units are connected.
Incorrect interconnections between units.
▪ The stop valve of an outdoor unit is left closed.
▪ The piping and wiring of the specified indoor unit are not
connected correctly to the outdoor unit.
12 Disposal
NOTICE
Do not try to dismantle the system yourself: the dismantling
of the system, treatment of the refrigerant, oil and other
parts must comply with applicable legislation. Units must
be treated at a specialised treatment facility for reuse,
recycling and recovery.
Installer and user reference guide
40
Cause Solution
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection.
Check if power supply is within range.
Correct phase order.
Check if the supply voltage is supplied properly.
Execute system test run.
Check if the power wiring for the outdoor unit is connected
correctly.
Check Q1/Q2 wiring.
Check if other indoor units have malfunction and confirm
indoor unit mix is allowed.
Check the type of indoor units that are currently connected.
If they are not proper, replace them with proper ones.
Connect interconnections F1 and F2 of the connected BP
unit correctly to the outdoor unit's PCB (TO BP UNIT). Make
sure that the communication with the BP unit is enabled.
▪ Open the stop valve on both the gas and liquid side.
▪ Confirm that the piping and wiring of the specified indoor
unit are connected correctly to the outdoor unit.
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1 – 2017.04