Daikin VRV II Series, Design, Installation & Testing Instructions, Page: 69 / 242

Si39-303 Test Operation
General Information 63
4.1.3 Check Operation
* During check operation, mount front panel to avoid the misjudging.
* Check operation is mandatory for normal unit operation.
(When the check operation is not executed, alarm code "U3" will be displayed.)
On completion of test operation, LED on outdoor unit PC board displays the following.
H3P ON: Normal completion
H2P and H3P ON: Abnormal completion
→
Check the indoor unit remote controller for
abnormal display and correct it.
In the case of multi-outdoor-unit system, make setting on the master unit PC board. (Setting
with the slave unit is disabled.)
[LED display in the case of multi-outdoor-unit system] (Same as that in emergency operation)
* Discriminate the operating status of the master unit/slave units through the following LED
display.
Malfunction code
In case of an alarm code displayed on remote controller:
Check on operation


















(V3057)
Press and hold the TEST
OPERATION button (BS4) on
outdoor unit PC board for 5
seconds.
¡
The test operation is started automatically.
The following judgements are conducted within 15 minutes.
2
“Check for wrong wiring”
2
“Check refrigerant for over charge”
2
“Check stop valve for not open”
2
Pipe length automatic judgement”
The following indications are conducted while in test operation.
2
LED lamp on outdoor unit PC board H2P flickers (test operation)
2
Remote controller Indicates “On Centralized Control” on upper
right.
Indicates “Test Operation” on lower left
LED display (
7
:ON
7
:OFF
9
:Blink)
H1P---H7P H8P
(Factory set)
Master:
Slave 1:
Slave 2:
77 7777777 7777 7
7777777 9
7777777 7
Cause of trouble due to faulty
installation work
Alarm
code
Countermeasure
Closed stop valve of outdoor unit E3
E4
F3
UF
In case of RXYQ5 to 16M (Single outdoor installation)
Liquid side stop valve : Open
Gas side stop valve : Open
Oil equalizing pipe stop valve : Close
In case of RXYQ18 to 48M (Multi outdoor installation)
Liquid side stop valve : Open
Gas side stop valve : Open
Oil equalizing pipe stop valve : Open
Reversed phase in power cable
connection for outdoor unit U1 Change connection of two wires among three for correct phasing.
Electric power for outdoor or indoor unit
is not supplied. (Including open phase) U4 Check that the power cable for outdoor unit is connected properly.
Incorrect wiring between units UF Check that the wiring between units corresponds correctly to
refrigerant piping system.
Refrigerant overcharge E3
F6
UF
Compute again optimum amount of refrigerant to be added based on
the piping length, then, collect the excessive amount by using
refrigerant collector to make the refrigerant amount proper.
Insufficient refrigerant E4
F3 - Check that additional charging has been carried out.
- Compute again the refrigerant amount to be added based on the
piping length, and charge proper amount of refrigerant additionally.