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Idiomas disponibles
Idiomas disponibles
Panel Fan
1. Open the condensate drain hole at the lowest point of the fan motor.
2. Run the fan for 2 hours at full speed to remove any moisture that may
have entered the fan motor.
Bearings
The bearings used in the fan and/or fan motor are maintenance free and
greased for life. Average lifespan during normal operation is >30,000 hours.
Defects in the bearings can usually be detected by listening. When the shaft /
impeller is rotated by hand, it should move freely with a smooth uniform
sound. Squeaking or grinding noises indicate the bearings may require
replacement.
Impeller
Cleaning the impeller is very important. A dirty impeller will suffer from
imbalance resulting in vibrations. A dirty impeller will also result in reduced fan
performance and reduced fan efficiency.
Capacitor (1~ fan motor)
Capacitor capacitance decreases slowly over time. Average lifespan is ±
30,000 hours. Replace the capacitor when the capacitance has dropped
below the value as listed on the capacitor.
7.3
Removing the guard for maintenance
Only for when the optionally available guard is mounted. [}See also page 3]
Fault
Airflow too high
Airflow too low
Excessive vibration
Fan does not start
Fan does not start
(supply voltage at fan motor terminals is present)
Fan motor overheats while running
INS00002- B
Original instructions
1. Loosen the nuts (3x, do not remove completely)
2. For 56-71cm / 22-28'' only: Remove the screws (3x)
3. For 92cm / 36'' only: Loosen the screws (4x, do not remove completely)
4. Slide the plastic clips outwards (3x)
5. Remove the guard
Reinstalling the guard:
1. Place guard back into position
2. Slide the plastic clips inwards (3x)
3. Fasten the nuts (3x)
4. For 56-92cm / 22-36'': Fasten the screws (3x / 4x)
8
Possible cause
Fan speed (rpm) too high
System resistance lower than specified
System resistance higher than specified
Impeller imbalance -> impeller damaged
Impeller imbalance -> impeller dirty
Bearings are damaged or worn
No power supplied to fan
(If present) VFD (Variable Frequency Drive) defec-
tive
Thermal protection activated
(Fan motor has overheated)
Impeller blocked
Only for 1~ fan motors: wrong or defective capacitor Replace the capacitor
Temperature too low for the bearing grease
Fan is overloaded
Fan motor overheated due to dirt in cooling fins.
Supply voltage too high or too low
Incorrect supply frequency
Only for 3~ motors: phase voltage imbalance
Only for 1~ motors: wrong or defective capacitor
Troubleshooting and repairs
WARNING
Troubleshooting and repairs must be performed by skilled
persons only!
Possible remedy
Check supply voltage and frequency
Reduce fan speed (if fan can be speed controlled)
Choose alternative fan
Choose alternative fan
Lower system resistance
Replace the impeller
Clean the impeller
Replace the bearings
Check all power supplies
Check fuse/circuit breaker
Check VFD (refer to VFD manufacturers' instruc-
tions)
Clean the motor
Check for overloading of fan system (intake or ex-
haust blocked?)
Check if the supply voltage is not too high or too low
Remove the blockage
Do not operate the fan outside the ambient tempera-
ture range as specified on the rating plate and tech-
nical data sheet
Check for overloading of the fan system (intake or
exhaust blocked?)
Clean the motor
Check the power supply
Check the power supply
Check the power supply
Replace the capacitor
ENGLISH (US) | 9
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