17
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Piping installation
Installer and user reference guide
107
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11
6
Perform the test procedure as described in
145].
INFORMATION
▪
When a malfunction is detected during the procedure (e.g., in case of closed stop
valve), a malfunction code will be displayed. In that case, refer to
codes when charging refrigerant"
107] and solve the malfunction accordingly.
Resetting the malfunction can be done by pushing BS3. The procedure can be
restarted from
"17.4.7 Step 6b: To manually charge refrigerant"
▪
Aborting the manual refrigerant charge is possible by pushing BS3. The unit will
stop and return to idle condition.
17.4.8 Error codes when charging refrigerant
Code
Cause
Solution
Unusual low pressure on
suction line
Close valve A immediately. Push
BS3 to reset. Check following
items before retrying
autocharge procedure:
▪
Check if the gas side stop
valve is opened correctly.
▪
Check if the valve of the
refrigerant
cylinder
is
opened.
▪
Check if the air inlet and
outlet of the indoor unit are
not obstructed.
Freeze-up prevention indoor
unit
Close valve A immediately. Push
BS3 to reset. Retry autocharge
procedure.
Indoor unit is out of
temperature range for leak
detection operation
Retry when ambient conditions
are satisfied.
Outdoor unit is out of
temperature range for leak
detection operation
Retry when ambient conditions
are satisfied.
Indicates an indoor unit which
is not compatible with leak
detection functionality is
installed (e.g., RA DX indoor
unit, Hydrobox, …)
Refer to requirements to be
able to execute leak detection
operation.
Other
malfunction
code
—
Close valve A immediately.
Confirm the malfunction code
and take corresponding action,
"23.1 Solving problems based
on error codes"
17.4.9 Checks after charging refrigerant
▪
Are all stop valves open?
▪
Is the amount of refrigerant, that has been added, recorded on the refrigerant
charge label?
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