BAC Vertex VRC A-1012N Series Operation & Maintenance Manual page 52

NOTE: Figure 20 and Figure 21 are from the Ziehl-Abegg ECblue Quick Start Guide
LED Code
OFF
Cooling down power module
LED Solid Red
Normal fan operation
1x
Missing run enable
2x
Temperature management
3x Hall effect sensor
malfunction
4x
Phase failure
5x
Motor blocked
6x
Power module failure
7x
DC undervoltage
8x
DC overvoltage
9x
Cooling down power module
11x
Error on motor start
12x
Line voltage too low
13x
Line voltage too high
14x
Peak current error
17x
Temperature alarm
20x
Modbus comm. error
Vertex™ Evaporative Condenser Operation & Maintenance Manual – Fan Control
Figure 21. Flashing Light Alarm Codes
Cause
No voltage being provided to the fan motor
electronics
N/A
Verify run enable
Motor temperature management active, which
temporarily decreases the maximum fan speed
to prevent motor overheating
The motor cannot determine the position of the
rotor relative to the stator
One or more phases of incoming power are lost
Fan blades are physically blocked
Controller circuitry has a short to ground or
motor winding is damaged
DC link voltage is lower than limit
DC link voltage is higher than limit
Motor is attempting to cool down
Fan attempted to start while rotating in the
opposite direction
Incoming voltage is below the unit nameplate
Incoming voltage is above the unit nameplate
Fan motor is overamping
Fan motor overheated, and fans will remain off
until temperature is within normal range
Excessive vibration is occurring on fan assembly
Table 7. Fan Alarm Code Descriptions
Comments Action
Verify incoming power
N/A
Add run enable or place
jumper wire
Verify fan can rotate freely
Reset power to unit
Verify incoming power
Inspect fan housing for
blockage
Verify wiring to motor
Verify wiring to motor
Verify wiring to motor
Verify fan can rotate freely
Reset power to unit
Verify incoming power
Verify incoming power
Verify fan can rotate freely
Verify fan can rotate freely
Inspect fan
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