• Outdoor Units • HEAT PUMP • RWEYQ-MY1
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10
• VRV Systems • Outdoor Units
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10
Installation of outdoor units
10 - 11Test run
10 - 11 - 3 Check operation
햲
Electrical box
햳
Cover of electrical box
햴
Cover for servicing
햵
Service window
햶
Points to be noted when providing services
<Cautions for check operation>
•
If operated within about 12 minutes after power supply has been applied to the indoor unit and outside unit, H2P will turn ON but the compressor
does not start running. Before start operation, make sure that the LED display is correct referring to the table (6) of “11-3 Check operation”.
•
The system may require up to 10 minutes until it can start the compressor after an operation start. This is a normal operation to equalize the
refrigerant distribution.
•
The check operation does not provide any means of checking the indoor units individually. For that purpose, perform normal operation using the
remote controller after the check operation.
•
Check operation is not possible in other modes such as collection mode.
•
If the setting of indoor remote controller is changed before the check operation, it may not be performed correctly and malfunction code “UF” may
be displayed.
Remote controller displays malfunction code
Malfunction code
Installation error
Remedial action
E3
E4
F3
F6
UF
U2
The shutoff valve of an outside unit is left closed.
Open the shutoff valve.
U1
The phases of the power to the outside units are reversed.
Exchange two of the three phases (L1, L2, L3) to make a positive phase
connection.
U1
U2
U4
No power is supplied to an outdoor or indoor unit (including phase
interruption).
Check if the power wiring for the outside 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.)
UF
Incorrect transmission between units
Check if the refrigerant piping line and the unit transmission wiring are
consistent with each other.
E3
F6
UF
U2
Refrigerant overcharge
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.
E4
F3
Insufficient refrigerant
•
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.
U7
UF
If an outdoor multi terminal is connected when there is one outside unit
installed
Remove the line from the outdoor multi terminals (Q1 and Q2).
UF
E4
The operation mode on the remote controller was changed before the check
operation.
Set the operation mode on all indoor unit remote controllers to “cooling.”
HJ
The heat source water is not circulating.
Make sure that the water pump is running.
