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8.3.5 - ANTI-SHORT CYCLE COMPRESSOR
• To avoid over-frequent starting-up of the compressor and thus increase its lifetime, a 3 minute time delay is triggered every
time the compressor is activated.
• If the temperature varies suddenly during this time delay to the point of calling for heating or cooling, or if the set-point is
changed in the same proportions, the LED for the corresponding demand starts flashing, indicating that the anti-short cycle
has been activated.
It is only after this time delay has run-out that the control activates the corresponding output, after which the LED lights
normally.
8.3.6 - OUTDOOR UNIT DEFROSTING
• The De-frosting cycle starts when the external sensor
assembled on the unit detects a temperature
≤
-3
°
C and
stops when the temperature r20
°
C or after a
maximum of 10 minutes.
• After de-frosting, a time delay prevents a new cycle for a
period of either 30 minutes, or 60 minutes. The selection
of the time delay is done by a jumper between terminals
2 and 6 of terminal strip KL1 (see above).
• During this time delay, the de-frosting cycle cannot restart
if the temperature falls below -3
°
C.
• The status of the relays during the defrosting can be
selected according to two variants:
- Air-conditioner without auxiliary heating (factory configuration)
(SC1 program switch set at position 1 on the remote control).
• If the temperature of the external sensor reaches
-3
°
C, the device switches to the de-frosting
function and the status of the relays will be as
follows (see table opposite).
• The PA ventilator stops, thus avoiding cold air
currents.
• To indicate that the device is in De-frosting mode,
the two cooling and heating demand LED’s 7 and
8 start flashing alternatively.
- Air-conditioner with auxiliary heating
(SC1 program switch on the remote control set at position 0).
8.3.7 - SAVING DURING POWER CUTS
• An accumulator installed on the power supply card permits saving the configuration during power cuts (operating mode,
ventilation mode, set-point).
• When restoring power, the control automatically returns to the previous configuration.
• However, to avoid incorrect switching, the outputs are activated only 20 seconds afterwards, permitting the device to measure
the current ambiance.
• The accumulator cannot save the data for a period longer than 4 hours after which they will be lost.
The device will be set at Standby after restoring power.
• The accumulator is fully charged when the device has been powered up for 3 days.
• If the temperature of the external sensor reaches
-3
°
C, the device triggers the defrosting cycle and
the status of the relays is therefore as follows (see
table opposite).
• Starting the auxiliary heating during the de-frosting
cycle prevents over-cooling the room.
• To indicate that the device is in De-frosting mode,
the two cooling and heating demand LED’s 7 and
8 start flashing alternatively.
Relay
REL 3
REL 2
REL 4/5/6
REL 1
REL 7
Status
energized
de-energized
de-energized
de-energized
de-energized
Function
Compressor in continuous operation
Reversal valve in Cooling position
Internal ventilator stopped
---
External ventilator stopped
Relay
REL 3
REL 2
REL 4
REL 1
REL 7
REL 5/6
Status
energized
de-energized
energized
energized
de-energized
de-energized
Function
Compressor in continuous operation
Reversal valve in Cooling position
Internal fan on slow speed
Auxiliary heating activated
External fan stopped
MS and HS inhibited
Defrosting sensor
No jumper between 2 and 6: 30 mn
Jumper between 2 and 6: 60 mn
END OF DEFROSTING CYCLE
• If the temperature of the external sensor r20
°
C or at maximum after 10 minutes, the device switches to normal
operation. The LED’s stop flashing and all the functions resume normal operation.
• A new de-frosting cycle cannot start until after a period of 30 or 60 minutes.
NOTE:
During defrosting, if the operating mode is changed by pressing key 3, the defrosting stage stops before the appliance
starts in the required mode. If the appliance has been switched to standby remotely, the defrosting stage stops after
15 seconds.
To ensure smooth air-conditioner operation, we recommend against changing the operating mode and
stopping the appliance when in a defrosting stage.
