MVAM036ME2AA User Manual

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31-5000474 Rev. 1 23

ENGLISH

TEST RUN AND FAULT CODE

Before Test Run

• Connect it to the power supply of the outdoor units to energize the sump heater in the compressor. Power it on 12

hours prior to startup and operation.

Check the connections at the drainpipe and wire connection lines to make sure they are correct.

• The drainpipe shall be placed at the lower part while the connection lines are placed at the upper part. Insulating should

be applied to drainpipes especially on the indoor units to avoid condensation issues.

• The drain pipe should be installed so it slopes away from the unit.

Checkup of Installation

• Check the main power connections for proper voltage balance.

• Check for any leaks at the piping joints.

• Check the power connections at the main power for the indoor & outdoor units.

• Check if the unit locations conform to installation guidelines.

• Check for excessive noise.

• Check if connection of the wiring is fastened.

• Check if the refrigerant and condensation lines are insulated.

• Check if the condensate drains are terminated properly.

• Check if the indoor units are positioned properly.

Test Run

• Ask the installation technician to perform a run test. Make sure the testing procedures is according to the manual and

check if the temperature controls work properly.

• The following procedure can be used to force compulsive running mode if the machine fails to start due to room

temperature. The function is not available for model types with remote control.

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of the system.

Fault Remedies

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wired controls or the number of LED flashes on the control panel of the indoor units/health lamp. Refer to the below table

for fault descriptions.

Indoor Unit Faults

Failure Code at Wired

Controller

PCB LED5 (indoor Units) /

Receiver Timer Lamp (Remote

Controller)

Fault Descriptions

01 1 Fault of indoor unit ambient temp. sensor TA

02 2 Fault of indoor unit pipe temp. sensor TC1

03 3 Fault of indoor unit pipe temp. sensor TC2

04 4 Fault of indoor unit dual heat source temp. sensor

05 5 Fault of indoor unit EEPROM

06 6 Fault of communication between indoor & outdoor units

07 7 Fault of communication between indoor unit and wired control

08 8 Fault of indoor unit float switch

09 9 Fault of duplicate indoor unit address

12 12 Fault of indoor unit 50Hz Zero-crossing

14 14 Fault of indoor unit DC motor

18 18 BS valve box or 4WV switch failure

20 20 Corresponding faults of outdoor units

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User Manual - Page 23