Cetetherm Mini Plus CM737
Installation, service and operating instruction
23
10.1 Fault codes on the control panel
If a spanner is visible on the display, there is an on ongoing alarm. Press the Info-button to view the fault code.
Error source
Error code
No fault (power-up)
0
Supply water temperature sensor or cable
1
Outside air temperature sensor out of range
2
Temperature in the connection box out of range
3
Cannot reach the set supply temperature
4
No communication between control panel and connection box
7
Fault code 0
This fault code can just be seen in the fault history, parameter settings category 5.
Not via the Info- button.
Fault code 1
Supply sensor or cable
Cause
Measured supply water temperature is below 0°C or above 100°C.
Actions
The control panel turn the pump off, and enter off mode (frost protection).
Check the supply sensor and its cable.
Fault code 2
Outside sensor out of operating range. This fault code can only occur after the measured
outside temperature has been in range: -40°C to 60°C.
Cause
Measured outside temperature is below -40°C or above 60°C
Actions
Enter room compensation until a valid temperature has been measured.
Check the outside sensor and its cable.
Fault code 3
Connection box temperature out of operating range
Cause
Measured environment temperature is below -0°C or above 60°C.
Actions
The control panel turn the pump off, and enter off mode (frost protection).
Make sure that the substation is mounted in a well vented room.
Fault code 4
Cannot reach the set supply water temperature
Cause
Air in the pump, low temp/ not district heating supply.
Actions
Vent the pump, check the control valve and actuator.
Fault code 7
No communication between control panel and connection box
Cause
The connection box does not communicate with the control panel (by OT) for 60 seconds.
Actions
Fault is only cleared after a power break and OT communication is working again.
Check the control panel cable.
