Danfoss FC Series Manuale di installazione - Pagina 4
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SCR/Diode Module Replacement for Fx09-Fx12/D1h–D8h/E1h–E4h
Installation Guide
ELECTROSTATIC DISCHARGE
Electrostatic discharge can damage components.
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Ensure discharge before touching internal frequency converter components, for example by touching a grounded, conduc-
tive surface or by wearing a grounded armband.
2.2 Installing SCR/Diode Modules
THERMAL INTERFACE
A proper thermal interface is required between the SCR/diode module and heat sink. Failure to follow these instructions results in
a poor thermal bond.
-
Ensure that the environment is free of airborne dust and contaminants while applying the thermal grease.
FASTENER SIZE
For some spare part kits, 2 different sizes of screws are included.
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Use the screw size that fits the heat sink.
HEAT SINK DAMAGE
A damaged heat sink can cause a frequency converter to malfunction. A clean and undamaged mounting surface allows proper
thermal dissipation.
-
Take care not to scratch or damage the heat sink when cleaning and servicing the frequency converter.
Refer to the service guide for SCR/diode module disassembly. To install replacement SCR/diode modules, use the following steps.
Procedure
1.
Clean the heat sink using a cloth and isopropyl alcohol to remove debris and remaining thermal grease.
2.
Verify that the thermal grease is not expired by checking the expiration date on the package.
If expired, order a new syringe of thermal grease (176F6769).
3.
With the syringe, apply thermal grease to the bottom of the SCR/diode module in the pattern shown in
It is not required to use the entire syringe, but excess thermal grease is not a problem.
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AN334838812834en-000201 / 130R0771