Exhausto EXact2 VEX240 series, Basic Instructions

Page: 91 / 108

EC Controller 2
Unit
Fault code
Category
Alarm description
Troubleshooting
(See appendix 1: "Simplified diagrams" for the location of dampers, sen-
sors, air directions, etc.)
xx yy z
37 02 4 The supply voltage to
the EC controller is too
low ● Check for low voltage to EC controller 2
37 03 4 The supply voltage to
the EC controller is too
high ● Check for overvoltage to EC controller 2
37 04 1 The EC controller mo-
tor is drawing too much
current ● Check the fan impeller can turn freely
● Check wear on the motor ball bearings
37 06 1 Temperature in the EC
controller power mod-
ule has risen above
90°C ● Check if the temperature at EC controller 2 exceeded the per-
mitted 35°C when the alarm was tripped. If the temperature
has been too high, the unit will restart when the air tempera-
ture falls below 35°C.
37 07 4 Temperature in the EC
controller power mod-
ule has risen above
120°C ● Check if the temperature at EC controller 2 exceeded the per-
mitted 35°C when the alarm was tripped. If the temperature
has been too high, the unit will restart when the air tempera-
ture falls below 35°C.
37 08 4 EC controller hardware
fault ● Restart unit. If this does not remedy the fault, replace EC con-
troller 2.
37 09 4 MCE FAULT ● Restart unit. If this does not remedy the fault, replace EC con-
troller 2.
37 10 4 Motor blocked ● EC controller motor is blocked
37 11 4 EC controller power
supply to motor has
lost a phase ● Check the cable between EC controller 2 and motor
● Check for a short circuit in the motor windings
37 14 4 The software version in
the EC controller is out
of date ● Upgrade software in EC controller 2.
37 15 4 EC controller does not
fit VEX/CX size ● Check whether the EC controller fits the VEX/CX size, see
VEX/CX configuration.
37 16 4 No modbus communi-
cation to EC controller ● Check the modbus cable between the main board and the EC
controller
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Alarms
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