Exhausto EXact2 VEX240 series, Basic Instructions

Page: 67 / 108

Frequency converter 2
Unit
Fault code
Category
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the positioning of dampers,
sensors, air directions, etc.)
xx yy z
02 15 4 Frequency converter
hardware fault Fault on frequency converter 2.
02 16 4 Frequency converter
software version out of
date ● Upgrade software in frequency converter 2.
Rotor control
Unit
Fault code
Category
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the positioning of dampers,
sensors, air directions, etc.)
xx yy z
03 01 3 Rotation alarm ● Check drive belt is intact. Faulty drive belts must be replaced
by a service technician.
● Check the rotor can rotate easily
● Check for defective rotor guard
03 02 3 Low voltage alarm ● Check for rotor control low voltage at the supply terminals in
the control system box
03 03 3 Overvoltage alarm ● Check for rotor control over voltage at the supply terminals in
the control system box
03 04 3 Rotor motor drawing
too much current Alarm indicates the step motor (most likely) or rotor control is de-
fective
● Check parts and replace defective part
03 05 3 Rotor control overhea-
ted Temperature in the rotor control has risen above 95°C
● Replace rotor control
03 06 3 No modbus communi-
cation to rotor control ● Check the cable between the connection board and rotor con-
trol
03 07 4 Rotor control inopera-
tive and outdoor air
temperature below 3°C The VEX has stopped because the outdoor air temperature is be-
low 3°C and the rotor does not operate.
3005167-2022-02-02
Alarms
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