Routine Maintenance; Cleaning Of Filter; Maintenance Before The Seasonal Use; Maintenance After The Seasonal Use - Lennox VRF VELD024N432U Installation & Operation Instructions

Low ESP Fan Coil Indoor Unit
controller.
② When the indoor unit is controlled by two wired controllers, the addresses of the two wired
controllers should be different through address setting. Address 1 is for main controller; Address 2
is for slave controller. Detailed setting please refer to the instruction manual of wired controller.

6 Routine Maintenance

Warning:
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 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
Content
Code
L0 Indoor Unit Error
L1 Indoor Fan Protection
L2 E-heater Protection
L3 Water Full Protection
Wired Controller
L4
Power Supply Error
Error
Content
Code
Indoor Units Incompatibility
LA
Error
LH Low Air Quanlity Warning
Outdoor-Indoor Incompatibility
LC
Error
d1 Indoor Unit PC-Board Error
Ambient Temperature Sensor
d3
Error
22
Error
Content
Code
Water Temperature Sensor
d8
Error
d9 Jumper Cap Error
Indoor Unit
dA
Hardware Address Error
Wired Controller PC-Board
dH
Error
Capacity DIP Switch Setting
dC
Error.