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HMI Fault List
Fault Message on HMI Potential Cause Corrective Action
HIGH TEMP ALARM SENSOR
XX
Room Temperature exceeded the
High Temperature Limit Fault for a
Fan Group. Fans in that Group shut
down.
Verify why the temperature is so high
and either correct the high-
temperature situation or raise the
high-temperature permissible limit.
LOW TEMP ALARM SENSOR
XX
Room Temperature dropped below
the Low Temperature Limit Fault for
a Fan Group. Fans in that Group
shut down.
Verify why the temperature is so low
and either correct the low-
temperature situation or decrease the
low-temperature permissible limit.
OVER AMP FAULT FAN XX
Fan speed is too high Reduce fan RPM
Motor wired incorrectly
Check motor wiring to wiring diagram
located on fan motor
Overload in VFD set too low Set overload to motor FLA value
MODBUS FAULT HMI XX
HMI not connected or assigned
incorrectly
Install HMI or change HMI address
using bottom 2 buttons on HMI.
MODBUS FAULT FAN XX
VFD not connected or assigned
incorrectly
Install VFD or change VFD address
using P410 and P403 on VFD.
MODBUS FAULT EXPANSION
BOARD
Expansion board not connected or
powered properly
When more than 8 external sensors
are used, an expansion board is
required to be installed, powered, and
configured.
SENSOR FAULT SENSOR XX
MISSING SENSOR
Temperature sensor x is not wired to
the ECPM03 board.
Verify proper wiring to terminals TxA
and TxB on the board and wiring to
the sensor.
SENSOR FAULT SENSOR XX
BROKEN SENSOR
Temperature sensor x is not reading
temperature correctly or is shorted.
Verify proper wiring to terminals TxA
and TxB on the board and wiring to
the sensor. If wiring is correct,
replace sensor with a 10Kohm
thermistor.
SENSOR FAULT SENSOR XX
MISSING BOARD
Temp sensor connected to
expansion board and expansion
board becomes disconnected
Re-connect expansion board.
FUSE F1 BLOWN Fuse F1 is blown or missing
Replace ECPM03 fuse and verify
there is no short-circuit, and load is
below 10 amps.
EMERGENCY SHUTDOWN
External Device has closed
terminals IL2A to IL2B
Make sure there is no danger of fire
and that contact is opened back up.
Press the CLEAR button.
SYSTEM BYPASS
System Bypass turned on. All fans
running at BMS speed.
Fix reason why System Bypass was
enabled and turn system bypass off
on ECPM03 menu
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