Multi Variable Air Conditioners Heat Storage Module
11
6.1 Maintenance Before Use-season
(1) Check whether grounding wire is in good condition.
(2) Check whether wire connection is correct.
6.2 Maintenance After Use-season
If you won’t use the heat storage module for a long time, disconnect power please.
7 Malfunction Codes of IDU
Error Code Content Error Code Content
Error
Content
d4
Inlet Pipe
Temperature Sensor
d6
Outlet Pipe
Temperature
dA
Indoor Unit
Hardware Address
C0
Communication
malfunction between
IDU, ODU and IDU’s
C5
Alarm because project
code of IDU is
inconsistent
— —
8 Troubleshooting
If your heat storage module is not working well, please check the following table first before
asking for service:
Phenomenon Troubleshooting
Alarm because project
code of IDU is
inconsistent
Press SW1 and SW2 buttons on main board of heat storage module at the same
time for at least 5s and release. Project code is displayed on digital tube. Press
SW1(UP)button or SW2(DOWN)button to select the project code. Press SW3 to
NOTICE:
If heat storage module still fails to work normally after checking and handling as described
above, please stop using it immediately and contact local service center for assistance.
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