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Reco-Boxx ZXR / ZXA / Flat – Operation and maintenance instructions
[03/
2022 ]
9.14 Type 14: Alarm indicating frost protection alert – fans stopped T
o
• Conditions:
• Frost protection is only selected for PX units with electrical preheating (KWin) or water preheating
(BAin) or if modulating bypass.
• Causes:
• With KWin or BAin option: in certain air T° conditions as measured on the exhaust airflow after the
heat recovery, indicating that the internal electrical KWin coil or external hydraulic coil (BAin) has
reached its limit, the TAC control can take over to guarantee the anti-frost function.
If T° < -5 C during 5 minutes, fans are stopped.
• With modulating bypass in frost protection ( A-FREEZE or AF+FREECOOL in the advanced
setup), this alarm indicates that the extracted air temperature at the exchanger output (T3 sensor)
has not exceeded 1 C during 15 minutes after that the bypass has been opened at 100%.
• Effects:
Displayed on Touchpanel
Code
Text displayed
Level
A.11
Anti-freeze - Fans stopped
3
TAC control board
ALARM OUTPUT
AL dPa OUTPUT
LED ALARM
Fans
Alarm Status
/
ON
stopped
Manual reset mandatory.
9.15 Type 15: Alarm indicating that the comfort T° is too high relative to setpoint T°
• Conditions:
• Only with post cooling option.
• Causes:
• The comfort T° setpoint cannot be reached (actual T° lower than setpoint during 15 minutes, or
30 minutes if comfort on T2 instead of T5, while post cooling is at maximum).
• Effects:
Displayed on Touchpanel
Code
Text displayed
Level
S.60
Post-cooling - T of the supply air too high
0
TAC control board
ALARM OUTPUT
AL dPa OUTPUT
LED ALARM
Fans
/
/
ON
/
Auto reset: yes
