Correcting Faults - Daikin MD5 Operation Manual

Correcting Faults

The recommended corrective action for faults is:
• Use the Fault listing table below to find and address the
root cause of the problem .
• Reset the drive . See Fault Resetting on page
Table 55: Fault Listing
Fault Code Fault Name In Panel
1 OVERCURRENT
2 DC OVERVOLT
3 DEV OVERTEMP
4 SHORT CIRC
5 RESERVED
6 DC UNDERVOLT
9 MOT TEMP
10 PANEL LOSS
11 ID RUN FAIL
12 MOTOR STALL
14 EXTERNAL FLT 1
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Description and Recommended Corrective Action
Output current is excessive . Check for and correct:
• Excessive motor load .
• Insufficient acceleration time (parameters 2202 ACCELER TIME 1).
• Faulty motor, motor cables or connections .
Intermediate circuit DC voltage is excessive . Check for and correct:
• Static or transient overvoltages in the input power supply .
• Insufficient deceleration time (parameters 2203 DECELER TIME 1).
Drive heatsink is overheated . Temperature is at or above limit .
R1...R4 & R7/R8: 115 °C (239 °F) R5/R6: 125 °C (257 °F)
Check for and correct:
• Fan failure .
• Obstructions in the air flow.
• Dirt or dust coating on the heat sink .
• Excessive ambient temperature .
• Excessive motor load .
Fault current . Check for and correct:
• A short-circuit in the motor cable(s) or motor .
• Supply disturbances .
Not used .
Intermediate circuit DC voltage is not sufficient. Check for and correct:
• Missing phase in the input power supply .
• Blown fuse .
• Undervoltage on mains .
Motor is too hot, based on either the drive's estimate or on temperature feedback .
• Check for overloaded motor .
• Adjust the parameters used for the estimate (3005...3009) .
Panel communication is lost and either:
• Drive is in local control mode (the control panel displays HAND or OFF), or
• Drive is in remote control mode (AUTO) and is parameterized to accept start/stop, direction or reference from the
control panel .
To correct check:
• Communication lines and connections
• Parameter 3002 PANEL COMM ERROR .
• Parameters in Group 10: START/STOP/DIR and Group 11: REFERENCE SELECT (if drive operation is AUTO) .
The motor ID run was not completed successfully . Check for and correct:
• Motor connections
• Motor parameters 9905...9909
Motor or process stall . Motor is operating in the stall region . Check for and correct:
• Excessive load .
• Insufficient motor power.
Digital input defined to report first external fault is active. See parameter 3003 EXTERNAL FAULT 1.
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OM 1191 • MD5 VFD