Technibel PHT 13, Installation Instruction

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GB
10
SUMMARY TABLE OF ALARMS
(*) The insufficient heat exchange alarm is activated if the temperature difference between the water inlet and outlet (after the
compressor has been operating for a few minutes) is insufficient (coolant charging problem, three-phase compressor running
“backwards”, jammed switch-over valve, faulty temperature probe, problem on the equipment, etc.).
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.
• Defrosting:
- if the temperature detected by probe
SD3
drops below the frosting temperature (dependent of the outside temperature),
a time counter is activated. This counter records the operating time in icing conditions. This status is indicated by the
flashing frosting indicator lamp (
7 ),
- after an accumulated operating time of 30 minutes, a defrosting operation is launched (inversion of the refrigerating cycle
and shut-down of the fan) until the temperature detected by probe SD3 rises above the end of frosting temperature
threshold. The defrosting phase is indicated by the (steady) illumination of indicator lamp (
7
).
Note:
The ventilation can restart after defrosting is completed to prevent excessive pressure build-up.
For special climatic conditions, the factory-set time counter value of 30 minutes can be adjusted. To do this, modify
parameter
d03 in the defrosting section " dFr ".
• Evaporation pressure regulation:
- the ECH controller is equipped with a variable voltage regulator for the
fan's power supply,
- based on temperature information (read by the SD3 probe located on
the evaporator), 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.
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
5 min at start-up Manual reset.
+
Inactive in
5 min in operation anti-freeze phase.
From probe
SD1
(water inlet).
Threshold: 70° C
adjustable (A25)
E41
X X E44
E05 60''
X X
E45 X X X
E46 30''
X
Configuration error
Anti-freeze (water
heat exchanger)
Water flow rate
Insufficient heat
exchange (*)
Max. water
temperature
Max. voltage (100%)
Min. voltage (60%)
Evaporation
temperature