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A complete list of read only and read/write parameters are
identified in the COPRA Products Modbus Spec.
6.7. Self protective function of the electronics (faults and motor
protections)
COPRA
Fans have two layers of motor protections: UL safety
TM
features, and non-UL safety features. The UL safety features are
backup protections if the non UL safety faults fails to shuts down or
activate limits/derating. If UL safety faults exceeds four counts, the
safety-core firmware will automatically perform a microler reset
Non UL Safety/application level protections:
• Over Voltage
• Under Voltage
• Over Temperature
• Loss of Input Phase
UL Safety-core level protections:
• Locked Rotor
• Loss of Output Phase
• Over Load
• Hardware Faults
6.7.1. Non UL - Over Voltage
1. Drive shuts down on over voltage when DC bus voltage exceeds the
threshold voltage (see table below)
Model
Over Voltage Threshold
(DC)
230 V
450 V DC
460 V
830 V DC (1.3 kW)
460 V
850 V DC (4.5 - 8 kW)
2. Drive will try to restart after a delay of 2 seconds. If the over voltage
condition persists, drive will shut down and indicate an over voltage
fault and keeps retrying after the fault wait delay expires. Note that the
number of retries is not limited.
6.7.2. Non UL - Under Voltage
1. Drive shuts down on under voltage when DC bus voltage falls below
the threshold voltage (see table below)
Model
Under Voltage Threshold
(DC)
230 V
220 V DC
460 V
440 V DC
2. Drive will try to restart after a delay of 2 seconds. If the under
voltage condition persists, drive will shut down and indicates an under
voltage fault. Drive will keep retrying after the fault wait delay expires.
Note that the number of retries is not limited.
6.7.3. Non UL - Over Temperature
1. Drive shuts down on Over Temperature when IPM temperature
exceeds the internal threshold.
2. Drive will try to restart after a delay of 30 seconds. If the over
temperature condition persists, drive will shut down and indicates an
over temperature fault. Drive will keep retrying after the fault wait delay
expires. Note that the number of retries is not limited.
6.7.4. Non UL - Utility supply power input phase
8
© 2023 Regal Rexnord Corporation. All Rights Reserved.
Approximate AC Input
Voltage
318 V AC
586 V AC
600 V AC
Approximate AC Input
Voltage
155 V AC
311 V AC
XXXXXXXXXX • Format# XXXXXX R1
1. Drive shuts down when loss of input phases is detected and
significant power (>50% of rated power) is used.
2. Drive will try to restart after a delay of 30 seconds. If the loss of
phase persists, drive will shut down and indicates a loss of phase fault
and keeps retrying after the fault wait delay expires. Note that the
number of retries is not limited.
6.7.5. UL - Locked Rotor
1. Drive shuts down on locked rotor on start-up if the locked rotor
condition is detected.
2. Drive will try to restart after a delay of 30 seconds. If the locked
rotor condition persists, drive will shut down and indicates an UL
Locked Rotor Fault and keeps retrying after the fault wait delay expires.
Note that the number of retries is not limited.
6.7.6. UL - Loss of Motor Phase
1. Drive shuts down if a sudden loss of one of the motor phases is
detected while the motor is running.
2. This fault is not detected when the drive's output current is zero (when
motor is in idle state).
3. Drive will try to restart after a delay of 30 seconds. If the loss of motor
phase condition persists, drive will shut down and indicates an UL Loss of
Motor Phase Fault and keeps retrying after the fault wait delay expires.
Note that the number of retries is not limited.
6.7.7. Non UL - Derating
• There are three types of derating: 1. Current Derating, 2. Power
Derating, 3. Temperature Derating
• Each of these has the following settings: 1. Threshold – Derate
threshold, 2. Hysteresis – Threshold below which derate will stop,
3. Derate period – Wait period before next RPM reduction, 4. Derate
RPM – Amount of RPM to reduce.
• If the measured value exceeds the threshold, the speed will be
dropped periodically to keep the measured value until it is below
the hysteresis threshold
• Typical temperature threshold is 110 deg C for 1.3kW and 107 deg C
for 4.5 kW and 8 kW.
6.7.8. UL - Over Load
• If the measured phase current into the motor is above the UL over
load threshold, motor will shut down on Over Load fault.
• Drive will try to restart after a delay of 30 seconds. If the condition
persists, drive will shut down and indicates an UL Fault and keeps
retrying after the fault wait delay expires. Note that the number of
retries is not limited.
6.7.9. UL - Hardware Faults
1. Drive shuts down on hardware faults if a hardware fault is detected
by safety core.
2. Drive will try to restart after a delay of 30 seconds. If the condition
persists, drive will shut down and indicates an UL Fault and keeps
retrying after the fault wait delay expires. Note that the number of
retries is not limited.
NOTICE
After 4 total UL Faults within a power cycle, motor will not attempt
restart until after 120 seconds..
7. Maintenance / repairs
7.1. Safety instructions
Before working on the fan, it is imperative to ensure the following:
•
All drives have been disconnected from the mains.
•
Wait until the impeller has come to a standstill.
•
Check the surface temperature to avoid any risk of burns.
•
Ensure that the fan cannot start up in an unled manner while
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