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8.17 TYPE 16: ALARM INDICATING THAT THE SUPPLY T° IS TOO LOW
- Conditions:
• Only with post heating or cooling option.
- Causes:
• This alarm indicates that the supply temperature (T5) is lower than 5°C. The fans are stopped for 1 minute.
The alarm is configurable through the advanced setup and is disabled by default.
- Effects:
Code
S.50
Post-heating - T° of the supply air too low
S.65
Supply air T° too low - Fan stopped
ALARM OUTPUT
Alarm Status
8.18 TYPE 17: ALARM INDICATING HYDRAULIC COILS FROST PROTECTION ALERT
- Conditions:
Only with internal hydraulic post heating coil (IBA), or external heating coil (EBA).
- Causes:
I ndicates that the anti-frost protection temperature of the hydraulic coil is lower than 4°C (configurable through advanced
setup, it is important to reduce this Setting for BAin coil if an antifreeze is in the fluid). The 3-way valve is automatically
opened at 100% for 15 minutes and the heating demand contact is closed (output DO7, see point 4.1, figure 1). If the AHU is
running, the alarm is sent after 2 minutes for a preheating coil and immediately for the others; if the AHU is not running, the
alarm is sent after 5 minutes.
- Effects:
Code
A.40
Anti-freeze protection of the internal post-heater (IBA)
A.41
Anti-freeze protection of the waterborne post-heater (EBA+)
A.42
Anti-freeze protection of the waterborne post-cooler (EBA-)
A.43
Anti-freeze protection of the waterborne reversible coil (EBA+-)
ALARM OUTPUT
Alarm Status
56
Displayed on HMI TACtouch
Text displayed
TAC control board
AL dPa OUTPUT
/
Manual reset mandatory.
Displayed on HMI TACtouch
Text displayed
TAC control board
AL dPa OUTPUT
/
Manual reset mandatory.
LED ALARM
ON
LED ALARM
ON
Operation and maintenance instructions
Level
0
3
Fans
Stopped
Level
3
3
3
3
Fans
Stopped
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