AEREX 0040.0420, Operation And Maintenance Instructions

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Reco-Boxx ZXR / ZXA / Flat – Operation and maintenance instructions [03/ 2021]
9.0 Troubleshooting
The control board generates and reports 18 types of alarms.
The alarms are subdivided into auto resetting and non-auto resetting alarms. For the latter, a reset will be
necessary once the problem has been resolved.
For each type of alarm, a full text description will be displayed on the user interface depending on the alarm
type:
• Activation of contact relay (NC or NO contact)- AL 1
• Activation of SAT3 OR1 in case of pressure alarm, provided that the optional module SAT 3 is installed
on the control board.
• “Alarm”, “Pa” and “AF” activated LED’s on control board.
• Alarm on user interface.
• Alarm communication with networking modules provided that an optional communication module
(Modbus RTU, MODBUS TCP/IP, and KNX) is installed on the TAC5 control board.
9.1 Type 1: Alarm indicating a fan failure
• Conditions:
• Causes:
• Failure of fan Fx. This problem is usually caused by the fan motor.
If not, the failure may be caused by an internal cable (control or power) or by the TAC5 circuit.
• Effects:
Displayed on Touchpanel
Text displayed LED ALARM LED Pa
B.11 Fan 1 failure
RED /
B.12 Fan 2 failure
B.13 Fan 3 failure
B.14 Fan 4 failure
TAC5 control board
AL1 relay O.R.1 LED ALARM LED AF Fans
Alarm / ON / stopped
Auto reset: yes