Danfoss 088U0200 Manual page 22

Instruction CF-MC Master Controller
8. Troubleshooting
Error indication
Output LED(s), alarm LED
and output menu LED
ash. Buzzer is ON*
Output LED(s), alarm
LED and input menu LED
ash. Buzzer ON after 12
hours**
Output LEDs 1-4, alarm
LED and input LED ash
Output LEDs 1-5, alarm
LED and input menu LED
ash
* Buzzer is shut o by pressing OK. The error indication continues until the
error is xed
** If the Room Thermostat signal is lost, the Master Controller output will
be activated 15 minutes every hour for frost protection until the error is
xed
22
VI.UH.K1.52
Possible Causes
Output or actuator is short-circuited or
the actuator is disconnected
No wireless signal from Room Thermostat
connected to this or these outputs or the
temperature in the according room is be-
low 5°C. (Try to verify the function of the
room thermostat by making a link test)
No signal from the Remote Controller
No signal from Master Controller #2 or #3
Produced by Danfoss Floor Heating Hydronics 08.2005