7 Troubleshooting
Installation and operation manual
11
SV1ASV4~8A14AJV1B
VRV 5 safety valve unit
4P709466-1 – 2023.09
In case of detection
1
The user interface of the indoor units connected to the SV unit
displays error "
A0-20
"
.
2
If applicable, the safety measures of the SV unit are activated.
These can be the following:
▪ the external alarm emits a signal, or
▪ the extraction fan and damper of the SV unit start operating in
case of a ventilated enclosure.
3
Contact your dealer immediately. For more information, see the
installation manual of the outdoor unit.
INFORMATION
To stop the alarm of the user interface, see the reference
guide of the user interface.
7
Troubleshooting
If one of the following malfunctions occurs, take the measures
shown below and contact your dealer.
WARNING
In case of a refrigerant leak, the system needs power to
contain the problem.
1. Do NOT turn OFF the power supply.
2. Contact your dealer.
Possible consequence:
Leaking refrigerant can lead to
suffocation, asphyxiation and fire.
In case anything else unusual occurs (burning smells etc.):
1. Stop operation.
2. Shut OFF the power
3. Contact your dealer.
Possible consequence:
Leaving the unit running under
such circumstances may cause breakage, electrical shock
or fire.
The system MUST be repaired by a qualified service person.
Malfunction
Measure
If the system does not
operate at all.
Check if there is no power failure. Wait until
power is restored. If power failure occurs
during operation, the system automatically
restarts immediately after power is restored.
Check if no fuse has blown or breaker is
activated. If necessary, change the fuse or
reset the breaker.
If the problem persists, contact your installer
If a refrigerant leak
occurs (error code
/
)
Actions will be taken by the system. Do NOT
turn OFF the power supply.
Contact your installer and report the error
code.
If a safety device such
as a fuse, a breaker
or an earth leakage
breaker frequently
actuates.
Turn off the main power switch.
Contact your installer
If water leaks from the
unit.
Stop the operation.
Contact your installer.
Other issues
Contact your installer. 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).
7.1
Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
7.1.1
Symptom: noise
▪ A "zeen" sound is heard immediately after the power supply is
turned on. The electronic expansion valve inside the SV unit starts
working and makes the noise. Its volume will reduce in about a
minute.
▪ A continuous low hissing sound is heard when the system is in
cooling or defrost operation. This is the sound of refrigerant gas
flowing through the SV unit.
▪ A hissing sound originating from the 4-way valve in the outdoor
unit which is heard at the start or immediately after stopping
operation or defrost operation, or when switching from cooling to
heating operation and vice versa.
8
Relocation
Contact your dealer to remove and reinstall the entire unit. Moving
units requires technical expertise.
9
Disposal
This unit uses hydrofluorocarbon. Contact your dealer when
discarding this unit. It is required by law to collect, transport and
discard the refrigerant in accordance with the "hydrofluorocarbon
collection and destruction" regulations.
NOTICE
Do NOT try to dismantle the system yourself: 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.
Summary of Contents for VRV 5
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