Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
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6 Routine Maintenance
(1) Do turn off the unit and cut off the main power supply when cleaning the air conditioner to
avoid electric shock or injury.
(2) Stand at solid table when cleaning the unit.
(3) Do not clean the unit with hot water whose temperature is higher than 45°C (113°F) to prevent
fade or deformation.
(4) Do not dry the filters by fire, or it may catch fire or become deformed.
(5) Clean the filter with a wet cloth dipped in neutral detergent.
(6) Please contact after-sales service staff if there is abnormal situation.
6.1 Cleaning of Filter
(1) Remove the filters from inlet of IDU. Use a vacuum cleaner to remove dust. If the filters are
dirty, wash them with warm water and mild detergent, and dry the filters in the shade.
(2) If the unit used in the environment with much dust, please clean it regularly. (Usually once
every two weeks.)
6.2 Maintenance before the Seasonal Use
(1) Check if the air inlet and air outlet of indoor and outdoor unit are blocked.
(2) Check if securely grounded.
(3) Check if all the power cord and communication cable are securely connected.
(4) Check if any error code displayed after energized.
6.3 Maintenance after the Seasonal Use
(1) Set the unit in fan mode for half a day in a sunny day to dry the inner part of unit.
(2) When the unit won’t be used for a long time, please cut off power supply for energy saving;
the characters on the wired controller screen will disappear after cutting off the power
supply.
7 Table of Error Codes for Indoor Unit
Error
Code
Content
Error
Code
Content
Error
Code
Content
L0
Indoor Unit Error
LA
Indoor Units
Incompatibility Error
d9
Jumper Cap Error
L1
Indoor Fan Protection
LH
Low Air Quality
Warning
dA
Indoor Unit Network
Address Error
L2
E-heater Protection
LC
ODU-IDU
Incompatibility Error
dH
Wired Controller PCB
Error
L3
Water Full Protection
d1
Indoor Unit PCB Error
dC
Capacity DIP Switch
Setting Error.
L4
Wired Controller
Power Supply Error
d3
Ambient Temperature
Sensor Error
dL
Outlet Air
Temperature
Sensor Error
L5
Freeze protection
d4
Inlet Pipe Temperature
Sensor Error
dE
Indoor Unit CO
2
Sensor Error
