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Operation and maintenance instructions – v2.8.8 & 2.7.3
- 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:
- Conditions:
• Only with internal hydraulic post heating coil (IBA), or external heating coil (EBA)
- Causes:
• Indicates 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 SAT3 O.R.3). 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:
7.18 TYPE 16: ALARM INDICATING THAT THE SUPPLY T° IS TOO LOW
8.19 TYPE 17: ALARM INDICATING HYDRAULIC COILS FROST PROTECTION ALERT
Displayed on HMI
Text displayed
LED ALARM
LED Pa
A.40
Anti-freeze protection of the internal post-heater (IBA)
Red
/
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+-)
TAC5 control board
AL1 relay
O.R.1
LED ALARM
LED AF
Fans
Alarm Status
/
ON
/
Stopped
Manual reset mandatory.
TAC5 control board
AL1 relay
O.R.1
LED ALARM
LED AF
Fans
Alarm Status
/
ON
/
Stopped
Manual reset mandatory.
Displayed on HMI
Text displayed
LED ALARM
LED Pa
S.50
Post-heating - T° of the supply air too low
RED
/
S.60
Supply air T° too low - Fan stopped
Содержание GLOBAL LP FW
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