GMV DC Air Handler
18
(2) If the unit used in the environment with much dust, please clean it regularly (Usually once
every two weeks).
7.2 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.
7.3 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.
8 The 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
L7
No Master Indoor
Unit Error
d6
Outlet Pipe Temperature
Sensor Error
C0
Communication Error
L8
Power Insufficiency
Protection
d7
Humidity Sensor Error
AJ
Filter Cleaning
Reminder
L9
Quantity Of Group
Control Indoor
Units Setting Error
d8
Water Temperature Error
o1
Low bus bar voltage of
indoor unit
o2
High bus bar
voltage of indoor
unit
o3
IPM Module Protection of
Indoor Unit
o4
Failure Startup of Indoor
Unit
o5
Overcurrent
Protection of Indoor
Unit
o6
Current Detection Circuit
Malfunction of Indoor Unit
o7
Desynchronizing
Protection of Indoor Unit
o8
Communication
Malfunction of
Indoor Unit’s Drive
o9
Communication
Malfunction of Main Mater
of Indoor Unit
oA
High temperature of
Indoor Unit’s Module
ob
Malfunction of
Temperature
Sensor of Indoor
Unit’s Module
oC
Charging Circuit
Malfunction of Indoor Unit
o0
Other Drive Malfunction
db
Special Code: Field Debugging Code
Summary of Contents for GMV-ND09A/B-T
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