Daikin VRV 5-S Series, Инструкция по установке и эксплуатации, Страница: 40 / 48

19 Troubleshooting
Installation and operation manual
40
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1A – 2020.01
Main code Cause Solution SVEO
(a)
SVS
(b)
▪ The stop valve of an outdoor unit is left closed.
▪ Insufficient refrigerant
▪ Open the stop valve on both the gas and liquid side.
▪ Check if the additional refrigerant charge has been
finished correctly. Recalculate the required amount of
refrigerant from the piping length and add an adequate
amount of refrigerant.
Refrigerant overcharge Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge level by
recovering any excessive refrigerant with a refrigerant
recovery machine.
Ambient temperature sensor malfunction (R1T) -
A1P (X18A) Check connection on PCB or actuator.
Discharge temperature sensor malfunction
(R21T): open circuit / short circuit - A1P (X19A) Check connection on PCB or actuator.
Suction temperature sensor malfunction
(R3T) - A1P (X30A) (suction)
(R5T) - A1P (X30A) (subcool)
Check connection on PCB or actuator.
Liquid temperature sensor (coil) malfunction
(R4T) - A1P (X30A) Check connection on PCB or actuator.
Liquid temperature sensor (after subcool HE)
malfunction (R7T) - A1P (X30A) Check connection on PCB or actuator.
Gas temperature sensor (after subcool HE)
malfunction (R6T) - A1P (X30A) (superheat) Check connection on PCB or actuator.
High pressure sensor malfunction (S1NPH):
open circuit / short circuit - A1P (X32A) Check connection on PCB or actuator.
Low pressure sensor malfunction (S1NPL): open
circuit / short circuit - A1P (X31A) Check connection on PCB or actuator.
Transmission outdoor unit - inverter: INV1 / FAN1
transmission trouble Check connection.
INV1 unbalanced power supply voltage Check if power supply is within range.
Insufficient supply voltage Check if the supply voltage is supplied properly.
Malfunction code: System test run not yet
executed (system operation not possible) Execute system test run.
No power is supplied to the outdoor unit. Check if the power wiring for the outdoor unit is
connected correctly.
System mismatch. Wrong type of indoor units
combined (R410A, R407C, RA, etc)
Indoor unit malfunction
Check if other indoor units have malfunction and confirm
indoor unit mix is allowed.
Improper type of indoor units are connected. Check the type of indoor units that are currently
connected. If they are not proper, replace them with
proper ones.
Incorrect interconnections between units. 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.
▪ 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.
▪ 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.
(a)
The SVEO terminal provides an electrical contact that closes in case the indicated error occurs.
(b) The SVS terminal provides an electrical contact that closes in case the indicated error occurs.
(c)
The error code is only shown on the user interface of the indoor unit where the error occurs.
19.2 Refrigerant leak detection system
Normal operation
During normal operation, the alarm only and supervisor remote
controller have no functionality. The screen of the remote controller
in alarm only and supervisor mode will be off. Operation of the
remote cownntroller can be checked by pushing the button to
open the installer menu.
b
a
c
d e
c
b b
c
d
f
g