Daikin VRV II RXYQ5MATL, Service Manual

Page: 120 / 331

Si39-504 Test Operation
Test Operation 109
Malfunction code
In case of an alarm code displayed on remote controller:
1.1.4 Confirmation on normal operation
•
Conduct normal unit operation after the check operation has been completed.
(When outdoor air temperature is 24°C or higher, the unit can not be operated with heating
mode. See the instruction manual attached.)
Confirm that the indoor/outdoor units can be operated normally.
(When an abnormal noise due to liquid compression by the compressor can be heard, stop
the unit immediately, and turn on the crankcase heater to heat up it sufficiently, then start
operation again.)
•
Operate indoor unit one by one to check that the corresponding outdoor unit operates.
•
Confirm that the indoor unit discharges cold air (or warm air).
•
Operate the air direction control button and flow rate control button to check the function of
the devices.
<Precautions for checking normal operation>
•
For a period of approximately 5 minutes after the compressor stops, even if the ON/OFF
button for the indoor units in the same refrigerant system is pressed, the compressor will not
operate.
•
After stopping the compressor operation using the remote controller, the outdoor unit may
conduct the residual operation for a period of 5 minutes at maximum.
•
If the system is set to "nighttime automatic low noise operation setting" or "external low noise
level setting", the outdoor unit fan may operate at a low speed, which, however, is not a
malfunction.
•
When the check operation is not conducted using the TEST OPERATION button at the first
test operation after installation, the malfunction code "U3" will be displayed.
Be sure to conduct the check operation according to 1.1.3 Check Operation (for details, refer
to information on the previous page.)
Cause of trouble due to faulty
installation work
Alarm
code
Countermeasure
The stop valve of an outdoor unit is left
closed. E3
E4
F3
F6
UF
Open the stop valve.
The phases of the power to the outdoor
units are reversed. U1 Exchange two of the three phases (L1, L2, L3) to make a positive
phase connection.
No power is supplied to an outdoor or
indoor unit (including open phase). U1
U4 Check if the power wiring for the outdoor units are connected
correctly.
(If the power wire is not connected to L2 phase, no malfunction display
will appear and the compressor will not work.)
Incorrect transmission between units UF Check if the refrigerant piping line and the unit transmission wiring are
consistent with each other.
Refrigerant overcharge E3
F6
UF
Recalculate the required amount of refrigerant from the piping length
and correct the refrigerant charge level by recovering any excessive
refrigerant with a refrigerant recovery machine.
Insufficient refrigerant E4
F3
•
Check if the additional refrigerant charge has been finished
correctly.
•
Recalculate the required amount of refrigerant from the piping
length and add an adequate amount of refrigerant.
If an outdoor multi terminal is connected
when there is one outdoor unit installed U7
UF Remove the line from the outdoor multi terminals (Q1 and Q2).
The operation mode on the remote
controller was changed before the check
operation. UF
E4
Set the operation mode on all indoor unit remote controllers to
"cooling".