Installation and operation manual
45
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
4P329765-1 – 2012.09
4
Make sure the default (idle) situation is existing; see
"13.2. Operating the push buttons and DIP switches on the logic
board" on page 30
. Push BS2 for 5 seconds or more. The unit
will start test operation.
The test operation is automatically carried out, the outdoor
unit display will indicate "
t01
" and the indication "Test
operation" and "Under centralized control" will display on the
user interface of indoor units.
Steps during the automatic system test run procedure:
-
"
t01
": control before start up (pressure equalization)
-
"
t02
": cooling start up control
-
"
t03
": cooling stable condition
-
"
t04
": communication check
-
"
t05
": stop valve check
-
"
t06
": pipe length check
-
"
t07
": refrigerant amount check
-
"
t08
": in case [2-88]=0, detailed refrigerant situation
check
-
"
t09
": pump down operation
-
"
t10
": unit stop
During the test operation, it is not possible to stop the unit
operation from a user interface. To abort the operation, press
BS3. The unit will stop after ±30 seconds.
5
Check the test operation results on the outdoor unit segment
display.
- Normal completion: no indication on the segment display
(idle)
- Abnormal completion: indication of malfunction code on the
segment display
Refer to
"15.5.3. Correcting after abnormal completion of the
test operation" on page 45
to take actions for correcting the
abnormality. When the test operation is fully completed,
normal operation will be possible after 5 minutes.
15.5.3. Correcting after abnormal completion of the test
operation
The test operation is only completed if there is no malfunction code
displayed on the user interface or outdoor unit segment display. In
case of a displayed malfunction code, perform correcting actions as
explained in the malfunction code table. Carry out the test operation
again and confirm that the abnormality is properly corrected.
15.6. Malfunction code list
In case of a displayed malfunction code, perform correcting actions
as explained in the malfunction code table.
After correcting the abnormality, press BS3 to reset the malfunction
code and retry operation.
The malfunction code which is displayed on the outdoor unit will
indicate a main malfunction code and a sub code. The sub code
indicates more detailed information about the malfunction code. The
malfunction code will be displayed intermittent.
Example:
With an interval of 1 second, the display will switch between main
code and sub code.
Below table gives an overview of the malfunction codes which may appear.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
INFORMATION
Refer to the installation manual of the indoor unit for other
detailed malfunction codes related to indoor units.
Main code
Sub code
Malfunction code
Contents
Solution
Main
code
Sub code
Master/slave 1/slave 2
E3
01/03/05
High pressure switch was activated (S1PH, S2PH) - A1P
(X3A; X4A)
Check stop valve situation or abnormalities in (field) piping or
airflow over air cooled coil.
02/04/06
• Refrigerant overcharge
• Stop valve closed
• Check refrigerant recharge unit
• Open stop valves
13/14/15
Stop valve closed (liquid)
Open liquid stop valve
18
• Refrigerant overcharge
• Stop valve closed
• Check refrigerant recharge unit
• Open stop valves
E4
01/02/03
Low pressure malfunction:
• Stop valve closed
• Refrigerant shortage
• Indoor unit malfunction
• Open stop valves
• Check refrigerant recharge unit
• Check the user interface's display or
• Transmission wiring between the outdoor unit and the
indoor unit
E9
01/05/08
Electronic expansion valve malfunction (subcool) (Y2E) - A1P
(X21A)
Check connection on PCB or actuator
04/07/10
Electronic expansion valve malfunction (main) (Y1E) - A1P
(X23A)
Check connection on PCB or actuator
03/06/09
Electronic expansion valve malfunction (storage vessel)
(Y3E) - A1P (X22A)
Check connection on PCB or actuator
F3
01/03/05
Discharge temperature too high (R21T/R22T):
• Stop valve closed
• Refrigerant shortage
• Open stop valves
• Check refrigerant recharge unit
20/21/22
Compressor casing temperature too high (R8T):
• Stop valve closed
• Refrigerant shortage
• Open stop valves
• Check refrigerant recharge unit
F6
02
• Refrigerant overcharge
• Stop valve closed
• Check refrigerant recharge unit
• Open stop valves
H9
01/02/03
Ambient temperature sensor malfunction (R1T) - A1P (X18A)
Check connection on PCB or actuator
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