SiAF332111E Test Operation (4/5/10/12 HP Models)
Part 5 Field Settings and Test Operation 165
5.3.1 Error Codes and Corresponding Measures
Please check the remote controller connected with the indoor unit.
For the case with centralized controller used, refer to the installation manual included with it
under service manual.
No display on the remote controller
Connection and communication error occurred between the indoor unit and the remote
controller. Check wiring connection for the broken and loose.
To those doing piping work
To those doing electrical work
After test operation is completed, check whether the casing of the units has been attached and
whether the screws have been tightened before transferring the air conditioner to your
customer.
Error code Description Solution
E3
The outdoor unit stop valve is left closed Open the gas side and liquid side stop valves.
The refrigerant is overcharged Recalculate the piping length and refrigerant
charge, and recover the excessive refrigerant with
a refrigerant recovery device, to bring the
refrigerant amount to a normal level.
E4
F3
The outdoor unit stop valve is left closed Open the gas side and liquid side stop valves.
The operation mode of the remote controller is
changed before performing test operation
Switch the operation mode of all indoor units to
cooling.
The refrigerant is insufficient • Check if the refrigerant has been charged.
• Recalculate the additional refrigerant charge
based on the piping length and refill to the
adequate amount.
F6
The refrigerant is overcharged Recalculate the piping length and refrigerant
charge, and recover the excessive refrigerant with
a refrigerant recovery device, to bring the
refrigerant amount to a normal level.
U3 Not performing test operation Perform test operation.
U4 No power is supplied to the outdoor unit Perform test operation.
UA Not using dedicated indoor unit Check if the indoor unit is special. If not, replace it.
UF
The outdoor unit stop valve is left closed Open the gas side and liquid side stop valves.
Incorrect piping and wiring connection between
indoor and outdoor units
Check if the piping and wiring connection between
indoor and outdoor units are correct.
The operation mode of the remote controller is
changed before performing test operation
Switch the operation mode of all indoor units to
cooling.
UH
Incorrect signal wiring connection Properly connect the wiring between units to the
terminal F1·F2 (TO IN/D UNIT) on the outdoor
unit's terminal board (X2M).
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