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4. USAGE AND OPERATION
2.4 Keyboard lock
To avoid mis-operation, please lock the controller after parameter setting.
At the main interface, press
for 5 seconds, the keyboard will be locked.
When the keyboard is locked, press
for 5 seconds, the keyboard will be
unlocked.
NOTES: When the unit is in alarming state, the key lock can be removed automaticly.
Hold on
TEMP
TEMP
IN
IN
MODE
MODE
TEMP
TEMP
SET
SET
OUT
OUT
Locked
2.5 Malfunction display
There will be malfunction code showing on the controller screen when relative
malfunction occurs.
You can refer to the malfunction table to find out the failure cause and solution.
For example
Water inlet temp. Sensor failure
MODE
SET
18
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