Daikin EWYQ230DAYN [385/524] Freeze up dis setpoint

Daikin EWAQ080DAYN [385/524] Freeze up dis setpoint
ESIE06-05 Functional Control for a Standalone Unit
Part 2 – Functional Description 2–159
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1
Functional
description
Loadup not possible area : if outlet water is lower then MOW then loadup is not possible.
Freeze-up prevention area : if outlet water temperature is lower then freeze up DIS + 0.5°C then
unload 1 compressor, as long as the outlet water temp is too low and until 1 compressor is in
operation.
Freeze-u safety disabling area: unit will shutdown.
Freeze-up
protection for
software version
2.2 or higher
When the evaporator outlet water temperature sinks below freeze-up disable setpoint, protection is
activated and the unit is shut down. When the temperature rises above the reset setpoint the freeze-up
protection is reset and the unit will work in its initial mode after compressor timers. The compressor
will go back to the necessary capacity step, depending on the load-up possible status. A maximum
number of freeze-up protections per 30 min can be set in the service/safety menu. When the unit
exceeds this number in less than 30 minutes, an alarm will be activated.
Remark:
A selection of the freeze-up safety can be made in the :
- FREEZE UP OW: DISABLE, freeze-up function as described in software version 2.1.
- FREEZE UP OW: DIS & SAF, freeze up function as described above.
When Freeze-up safety is active, the controller will display “O4A: Freeze UP” alarm.
Outlet temp
Time
RESET
setpoint
FREEZE UP
DIS setpoint
+0.5°C
Freeze-up prevention
area (loaddown)
Freeze-up
safety-disabling
(shutdown)
FREEZE UP
DIS setpoint
Characteristics Freeze-up prevention
Control device Sensor
Diagram name R3T, R4T
Activation
Result
Leaving water temperature < FREEZE UP DIS
Unit disabled, after
Reset Reset when leaving water temperature rises
above MOW setpoint.

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