Danfoss CDS 302 Troubleshooting Manual
Compressor drives
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Also See for CDS 302:
- Operating instructions manual (173 pages) ,
- Operating instructions manual (161 pages) ,
- Manual (6 pages)
Related Manuals for Danfoss CDS 302
Summary of Contents for Danfoss CDS 302
- Page 1 Compressor Drives Troubleshooting Check List CDS 302/CDS 303 http://cc.danfoss.com...
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Page 3: Table Of Contents
Content Check List Introduction ............................4 For Your Safety ............................. 5 Diagnostics............................6 Initial Trouble Shooting (visual inspection of the installation) ............7 Input power wiring ....................................7 Output to motor ......................................7 Grounding ........................................7 Control wiring ......................................7 Programming ...................................... -
Page 4: Introduction
BEFORE RETURNING A FREQUENCY CONVERTER FOR limit the number of NFF. FACTORY INSPECTION. CHECK ALL POSSIBILITIES. The purpose of this check list is to facilitate IN CASE OF DOUBT, PLEASE SEEK DANFOSS SUPPORT. users, field technicians, engineers and service FRCC.PC.036.A2.02... -
Page 5: For Your Safety
Check List For Your Safety Frequency Converters (FC) contain dangerous remote DC-link power supplies, including voltages when connected to the line voltage. battery backups, UPS and DC-link connections Only a competent technician should carry out to other frequency converters. the service. •... -
Page 6: Diagnostics
Do not exchange the drive before contacting Check the alarm code and refer to the Danfoss support. troubleshooting session of the Operating Instructions VLT® CDS 302 and CDS 303 on page 135. It contains guidance for the complete list of alarms and warnings. Figure 2: WARNINGS... -
Page 7: Initial Trouble Shooting (Visual Inspection Of The Installation)
Check List Initial Trouble Shooting (visual inspection of the installation) This list shows a variety of conditions that Display: Warnings, alarms, drive status; fault should be inspected visually as a part of initial history and many other items are available on the troubleshooting. -
Page 8: Trouble Shooting
Check List Trouble shooting Fault Symptoms - Display A fault must have been ocurred when there is: of the drive a) No Display in the LCP (blank) b) Intermittent display in the LCP No display (blank display) There are three LED indicators lights near the indicates that communications may have failed bottom of the LCP. -
Page 9: Fault Symptoms In The Compressor (Motor)
Check List Trouble shooting • The first step is to rule out the problem in the control wiring. Figure 5: Check control cables • Disconnect all control wiring by unplugging the • If the display stays lit then the problem is in the control terminal blocks from the control card. - Page 10 Check List Trouble shooting Stop (figure 9) Message displayed when the Terminal 27 is low Ensure that terminal 27 is logic 1 (pressure (no signal). switch). Figure 9: Check pressure switch Run OK: 25Hz The RUN OK status display indicates that a run Check the control wiring to ensure that a command has been given to the drive but the proper reference signal is present at the drive...
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Page 11: Common Drives And Motor Problems
Check List Common drives and motor problems The common drives and motor problems occur • Motor/load due to an error in the • Internal drive • Control logic • Programming Control logic problems Control logic problem occurs when the drive If there is not a correct indication, the next step is does not respond to a given command. -
Page 12: Igbt, Motor Or Load Problems
Check List Common drives and motor problems IGBT, Motor or load The motor or motor wiring can develop a phase • Perform the dynamic output test procedure on problems to phase or phase to ground short resulting in all three phases with a digital voltmeter. alarm indication and a trip of the unit. -
Page 13: Emc - Electro Magnetic Compatibility
Check List Common drives and motor problems EMC - Electro Magnetic Compatibility Effects of EMI Electro Magnetic compliance or EMC are the Detrimental Effects To These Systems May voltage and current which are not sinusoidal but Include The Following: pulsating. •... -
Page 14: Static Test Procedures
Check List Static test procedures POWER MUST BE OFF / MAINS AND MOTOR • If rectifier or IGBT fail, the complete power CABLES DISCONECTED! card has to be exchanged, since in the CDS drives, the rectifier and IGBT are integrated in one power card. -
Page 15: Igbt Static Test
Check List Static test procedures Step 4 Now reverse the meter leads, i.e. connect the • Connect the positive terminal of the meter lead negative terminal of the meter lead to the to the input terminals L1, L2, L3 in turn. •... - Page 16 Check List Static test procedures Step 4 Now reverse the meter leads, i.e. connect • Connect the negative terminal of the meter the positive terminal of the meter lead to the lead to the motor terminals U, V, W in turn. •...
- Page 18 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
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Questions and answers
can these drives be installed in an outdoor environment without being in a panel, for example on the outside wall of an outdoor HVAC unit
No, Danfoss CDS 302 drives should not be installed outdoors on the exterior wall of an HVAC unit without a panel. They require protection from environmental conditions such as moisture, corrosion, harmful airborne contaminants, and must be mounted on a flat solid surface with proper airflow clearance.
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