OPERATING AND MAINTENANCE MANUAL
Chapter 7 - Electronic controller
TAEevo Tech 015÷802 60 Hz UL
44
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
ENGLISH
EN
7.11.11 Anti-freeze alarm
The anti-freeze alarm is reset automatically. It switches to manual reset after 3 trips/hour.
With the unit in Stand-by or OFF the anti-freeze alarm message is tripped in reference to the chiller and heat pump setpoints.
7.11.12 Chiller mode anti-freeze alarm
7.11.13 Level sensor and/or flow meter alarm
Each time the water pump is started the level sensor alarm is disregarded for time AL15 to allow the hydraulic circuit to
reach steady state conditions. In normal operating conditions, if the level sensor is in alarm for time AL17 the compressor is
stopped and label AEFL is displayed: the water pump continues to run for additional time AL16 after which, if the level
sensor is still in alarm, the pump is stopped.
At this point the alarm persists with manual reset so it must be reset manually.
Parameter AL18 is the time for which the level sensor must not be in alarm in order to allow a reset.
AL15 Pump start level sensor alarm delay
Used to set a delay for acknowledgement of the level sensor alarm from starting of the water pump to allow the flow rate to
reach steady state conditions.
AL16 Alarm persistence time to stop the water pump.
Defines the level sensor alarm persistence time (digital input active) after which the alarm switches from automatic reset to
manual reset and the water pump is stopped.
AL17 Level sensor input active duration
Used to set a time during which the level sensor alarm must persist before the alarm is signalled. The count starts after time
AL15 and makes it possible to filter out possible flow rate drops or the presence of air pockets in the water circuit.
AL18 Level sensor input not active duration
Used to set a time during which the level sensor alarm must remain inactive; after this interval, if the alarm is automatic reset
type it is reset, while it can be reset manually if it is manual reset type.
Chiller Operation
Display labels meaning b1AC (chiller mode circuit 1 anti-freeze alarm)
b1Ac (chiller mode circuit 1 anti-freeze alarm indication)
With the alarm active and a dual circuit unit both the labels are displayed
(b1AC-b2AC/b1Ac-b2Ac).
Cause of trip In operation and in stand-by remote OFF, if the anti-freeze control probe detects
a temperature < set AL26 for at least AL28 seconds.
Reset Anti-freeze control probe detects a temperature > set A26 + differential AL27.
Reset Automatic - becomes manual after AL29 trips / hour (reset procedure in
functions menu).
Icon Flashing
Action The compressors are stopped and the alarm label is displayed (b1AC b2AC)
and the Alarm relay + buzzer are activated
Regulators
Alarm If AL30=1 Relay + buzzer activated + anti-freeze heaters
Inversion valve Follows its control
Recovery valve Follows its control
Free cooling ON/OFF valve Follows its control
Auxiliary relay Follow(s) its/their control
No-load start-up valve Follows its control
Delivery fan If air-air unit off
Condensing fans Follows its control
Support /water heater /anti-freeze If air-air unit off, otherwise follows its control
Support /water heater /anti-freeze With alarm from ID activated
Evaporator/ condenser water pump(s) Follows its control
Compressors Off
Pump down solenoid Off
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