Daikin VRV II RXYQ5MY1B Service Manual page 126

SiE39-404
1.1.3 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.)
Press and hold the TEST
OPERATION button (BS4) on
outdoor unit PC board for 5
seconds.
Check on operation
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
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)
Malfunction code
In case of an alarm code displayed on remote controller:
Cause of trouble due to faulty
installation work
Closed stop valve of outdoor unit
Reversed phase in power cable
connection for outdoor unit
Electric power for outdoor or indoor unit
is not supplied. (Including open phase)
Incorrect wiring between units
Refrigerant overcharge
Insufficient refrigerant
Test Operation
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"
⎪
2Pipe length automatic judgement"
⎪
The following indications are conducted while in test operation.
⎪
2LED lamp on outdoor unit PC board
⎪
2Remote controller
⎪
⎩
* Discriminate the operating status of the master unit/slave units through the following LED
display.
LED display (7:ON 7:OFF 9:Blink)
H1P---H7P H8P
77 7777777 7777 7
Master:
7777777 9
Slave 1:
7777777 7
Slave 2:
(Factory set)
Alarm
code
E3
E4
F3
UF
U1
U4
UF
E3
F6
UF
E4
F3
Indicates "On Centralized Control" on upper
right.
Indicates "Test Operation" on lower left
abnormal display and correct it.
Countermeasure
In case of RXYQ5 to 16M (Single outdoor installation)
Liquid side stop valve
Gas side stop valve
Oil equalizing pipe stop valve : Close
In case of RXYQ18 to 48M (Multi outdoor installation)
Liquid side stop valve
Gas side stop valve
Oil equalizing pipe stop valve : Open
Change connection of two wires among three for correct phasing.
Check that the power cable for outdoor unit is connected properly.
Check that the wiring between units corresponds correctly to
refrigerant piping system.
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.
- 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.
Test Operation
H2P flickers (test operation)
: Open
: Open
: Open
: Open
⎫
⎪
⎪
⎪
⎪
⎪
⎪
⎪
⎭
(V3057)
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