Technibel CHG 11 - Page 11

GB
11
SUMMARY TABLE OF ALARMS
(*) The refrigeration circuit alarm is activated if the temperature difference between the water inlet and outlet (after a few minutes
of compressor operation) is insufficient (refrigerant charge, three-phase compressor turning "backwards"…).
5.8 - SPECIAL OPERATING FEATURES
• Reduction of water volume
:
- the controller uses a self-adapting algorithm that analyses the compressor's operating time and can indicate deviations
of the current set point (and the corresponding hysteresis) in case of too short operating times (in order to extend the
operating times),
- for special applications, in which case the dimensioning of the unit and the circuit are carefully designed, this function
can be deactivated. To do this, set the parameter
C08 to 0 in the "CP" section of the parameterization menu.
• Condensation pressure control:
- the ECH controller is equipped with a variable voltage regulator for the
fan's power supply,
- based on temperature information (captured by probe
SD3 placed on
the condenser), the controller varies the supply voltage of the electric
fan according to the diagram opposite,
•
Circulating pump control:
- the pump is actuated when the unit operating or in stand-by mode,
- the pump is stopped when the unit is completely OFF. The shut-down
of the pump is delayed 1 minute after the compressor stops. An anti-freeze device forces pump operation if the outside
temperature (probe
SD4) drops below 0
°
C,
-
an "anti-sticking" device forces pump operation (if stopped) for 3 seconds every 24 hours.
•
Operating mode selection:
-
the regulator is factory configured to control the unit by 1 external On/Stand-by contact
,
-
in stand-by mode, the circulating pump continues to function.
Note:
It is possible to shut the unit down completely (circulating pump stopped) by pressing the ON/OFF button (1).
-
this configuration is adapted to system applications,
Alarm Code Inhibition delay
Compressor
stop
Fan stop
Circulating pump
shut-down
Remarks
Fault on probe 1 E40 X X
Fault on probe 2 E06 X X
Fault on probe 3 E07 X X
Fault on probe 4 E42 X X
Forced circulating pump
operation
H.P. E01 X
B.P. (low pressure) E02 30'' at start-up X X
From probe
SD2 (water outlet).
Threshold : 4° C
10'' in operation X X X
If passage
30'' at start-up reset
manual
120'' at start-up
+
120'' in operation
From probe
SD1 (water inlet).
Threshold : 30° C
Manual reset.
Configuration error
Anti-freeze (water
heat exchanger)
Water flow rate
Refrigeration
circuit (*)
Max. water
temperature
E45
X
X
X
E46
30''
X
E41
X
X
E44
E05
60''
X
X
Max. voltage (100%)
Min. voltage (60%)
Probe SD3
condensation
temperature