20 Fan Coil FC600 Instruction Manual
2.9.4 Error Codes
Regardless the mode the Fan Coil is operating in - heating (including Frost Protection) or cooling mode, once
the external sensor is disconnected or malfunctioning, the thermostat shows alternately the warning letters
for 2 seconds and current temperature for 2 seconds to warn the user the external sensor is disconnected or
malfunctioning. At the same time, the LCD backlight will turn on when the warning letters are displayed, then
turn off when current temperature is displayed.
Error Code
Description
01
Pipe sensor input is open or pipe sensor is not connected
02
Pipe sensor input short circuit
03
External sensor open or external sensor is not connected
04
External sensor short circuit
When the external sensor is reconnected or fixed, thermostat will return to Normal mode and display the
current room temperature.
When Err XX appears, the thermostat will be closed.
2.9.2 Key Lock Function
To lock the keys on the thermostat, please press the and together. LCD shows key lock icon . To
unlock the keys, press the same keys together again.
M
M
Press together for 3 seconds.
M
Keys locked.
2.9.3 Service Filter Reminder
The 'clean fan filter reminder' function counts the fan operating hours and displays the icon to remind the
user to clean the fan filter as soon as the threshold is reached. This does not impact the thermostat's operation,
which continues to run normally.
M
Long press button for 5 seconds to cancel filter reminder.
3sec
3sec
M
M
