Carrier 40VU007-0182-7G-QEE, Installation And Owner'S Manual, Page: 28 / 169

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• Before switching on the unit, test the supply terminal tier (L, N terminals) and grounding points with 500V megaohm
meter and check if the resistance is above 1MΩ. The unit cannot be operated if it is below 1MΩ.
• Connect the unit to the power supply of the outdoor units to energize the heating belt of the compressor. To protect
the compressor at start-up, power it on 12 hours prior to the operation.
• Review the test run procedures in the outdoor unit and ensure that the outdoor unit has been properly installed
according to the instructions in the outdoor manual.
Check that all piping has been installed, connected and insulation in accordance with the instructions
provided in the manual.
Ask the installation personnel to conduct a test run. Conduct the testing procedures according to the manual and
check if the temperature regulator works properly.
When the machine fails to start due to the room temperature, the following procedures can be undertaken to conduct
compulsive running. This function is not provided for the type with remote control.
• Set the wired controller to cooling/heating mode, press ‘ON/OFF’ button for 5 seconds to enter into the compulsive
cooling/heating mode. Press the ‘ON/OFF’ button again to quit compulsive running and stop the operation of the air
conditioner.
When any fault appears, consult the fault code of the wired control or the flashing times for LED5 on the indoor unit
board, and find the faults as shown in the following table to troubleshoot.
Indoor unit faults
Before test run
Test run method
Fault remedies
Installation checkup
check if the mains voltage matches
check if there is leakage at the piping joints
check if the connections of mains power and indoor & outdoor
units are correct
check if the serial numbers of the terminals match
check if the installation place meets requirements
check if there is too much noise
check if the connecting line is fastened
check if the connectors for tubing are heat insulated
check if the water drains outside
check if the indoor units are positioned
Failure code at
wired controller
PCB LED5(Indoor Units)/
Receiver Timer Lamp
(Remote Controller)
Fault Descriptions
01 1 Fault of indoor unit ambient temperature transducer TA
02 2 Fault of indoor unit pipe temperature transducer TC1
03 3 Fault of indoor unit pipe temperature transducer TC2
04 4 Fault of indoor unit dual heat source temperature transducer
05 5 Fault of indoor unit EEPROM
06 6 Fault of communication between indoor and outdoor units
07 7 Fault of communication between indoor unit and wired control
08 8 Fault of indoor unit water drainage
09 9 Fault of duplicate indoor unit address
0A 10 Fault of communication between indoor unit and display board
0C 12 Fault of zero crossing
0E 14 Fault of DC fan
Outdoor unit
code
20 Corresponding faults of outdoor units
Test Run & Fault Code
English