Swegon ESENSA PX TOP Operation & Maintenance Instructions Manual page 13

6.12 TYPE 12: ALARM INDICATING THAT THE COMFORT T° IS TOO LOW RELATIVE TO SETPOINT T°
- Conditions:
• Only with post-heating 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 heating is at maximum)
- Effects:
Displayed on HMI TACtouch
Code Text displayed
S.50 Post-heating - T° of the supply air too low
TAC control board
ALARM OUTPUT AL dPa OUTPUT
/ /
24 www.swegon.com
GB.ESENSA.MO.231025
LED ALARM Fans
ON /
Auto reset: yes
We reserve the right to alter specifications.
6.13 TYPE 13: ALARM INDICATING HEAT EXCHANGER FROST PROTECTION ALERT
- Conditions:
- Causes:
• For unit wih counter flow heat exchanger:
- With antifrost protection of the heat exchanger by supply airflow reduction - associated alarm code: A.21: after the
temperature of exhaust air at the exchanger output (T3) becomes lower than 5°C for 5 minutes, the setpoint for the
supply airflow is reduced in a linear way from 100% to, at 1°C, 33% (CA, TQ, LS mode) or 50% (CP mode) respect to the
current setpoint. High and low temperatures of 5°C and 1°C are configurable in advanced settings.
-With preheating option (KWin or BAin) - associated alarm code: A.10:
Once 100% of the power is output to the preheater and T3 (exhaust temperature) is lower than anti-frost temperature
Level
(T°AF, 1°C by default), then both flows will be reduced by steps every same intervals until that T3 will exceed T° AF or
that 33% of the airflows before reduction are reached. In this last case, a defrost process is entered for 30 minutes:
0
preheater and Supply will be stopped while exhaust will be at its level before reduction. After the defrost period, the
antifrost process will restart with preheater at 100% and both flows at 33%. During airflow reduction, if T3 becomes
higher than T° AF, the flows will increase at same rate than for reduction.
• For unit with heat wheel exchanger - associated alarm code: A.23:
When external temperature (T1 sensor) is lower than the anti-frost temperature (T°AF, -9°C by default), the rotation
speed of the heat exchanger will decrease (2RPM by default, configurable in advanced setup) to avoid any risk of
frosting on it.
After that T1 ≥ T°AF during 5 minutes, then the wheel will turn back at nominal rotation speed.
- Effects:
Code
A.10 Pre-heating - Reduction (PX + KWin/BAin)
A.21 Anti-freeze - Reduced supply air flow (PX)
A.23 Anti-freeze - Reduced rotor speed (RX)
ALARM OUTPUT
/
* A.10: reduction on both fans by steps see description here above
A.21: reduction of supply fan linearly see description here above
A.23: no effect on fans
We reserve the right to alter specifications.
Displayed on HMI TACtouch
Text displayed
TAC control board
AL dPa OUTPUT LED ALARM
/ ON
Auto reset: yes
GB.ESENSA.MO.231025
Level
2
1
1
Fans
*
www.swegon.com 25