Refer to, For a list of alarm codes, Minor faults and alarms – Yaskawa Z1000U HVAC Matrix Bypass User Manual

SCF

Safety Circuit Fault

SEr

Too Many Speed Search Restarts

SoH

Snubber Discharge Resistor Overheat

SrC

Phase Order Detection Fault

Srr

Internal Resistance Fault

SvE

Zero Servo Fault

TdE

Time Data Error

TIM

Time Not Set

HOA

Keypad

Display

Name

Page

UL3

Undertorque Detection 1

UL5

Mechanical Weakening Detection 2

Uv1

<3>

Control Circuit Undervoltage Fault

Uv2

<3>

Control Power Supply Voltage Fault

Uv3

<3>

Undervoltage 3 (Soft-Charge Bypass Circuit

Fault)

Refer to Faults on page 232

<1> Displayed as CPF00 when occurring at drive power up. When one of the faults occurs after successfully starting the drive, the display will show

CPF01.

<2> Displayed as CPF20 when occurring at drive power up. When one of the faults occurs after successfully starting the drive, the display will show

CPF21.

<3> Fault histories are not kept when CPF00, CPF01, CPF06, CPF24, Fdv, oFA00, oFb00, oFC00, Uv1, Uv2, or Uv3 occur.

Minor Faults and Alarms

Refer to

Table 6.5

for an overview of possible alarm codes. Conditions such as overvoltages can trip faults and alarms. It is

important to distinguish between faults and alarms to determine the proper corrective actions.
When the drive detects an alarm, the ALM indicator LED blinks and the alarm code display flashes. Most alarms trigger a

digital output programmed for alarm output (H2-oo = 10). A fault (not an alarm) is present if the ALM LED lights without

blinking.

for information on fault codes.

Table 6.5 Minor Fault and Alarm Displays

HOA

Keypad

Display

Name

Minor Fault

Output

(H2-oo = 10)

Page

AEr

Station Address Setting Error (CC-

Link, CANopen, MECHATROLINK)

YES

AL02

BAS Interlock Open

–

AL03

Smoke Purge in Bypass

–

AL04

Smoke Purge in Drive

–

AL13

Loss of Load

–

AL14

Serial Communications Alarm

–

AL16

Input Phase Rotation

–

252

AUv

Power Supply Undervoltage

YES

235

Baseblock

No output

<2>

252

bUS

Option Card Communications Error

YES

252

CALL

Serial Communication Transmission

Error

YES

MEMOBUS/Modbus Communication

Error

YES

CrST

Cannot Reset

YES

dnE

Drive Disabled

YES

doH

Damping Resistor Overheat

–

236

Forward/Reverse Run Command

Input Error

YES

EF0

Option Card External Fault

YES

EF1 to

EF8

External Fault

(input terminal S1 to S8)

YES

FbH

Excessive PID Feedback

YES

FbL

PID Feedback Loss

YES

HOA

Keypad

Display

Name

Minor Fault

Output

(H2-oo = 10)

Page

Fdv

Power Supply Frequency Fault

–

241

HCA

Current Alarm

YES

inTLK

Interlock Open

–

LT-1

Cooling Fan Maintenance Time

No output

<1>

LT-2

Capacitor Maintenance Time

No output

<1>

LT-3

Soft Charge Bypass Relay

Maintenance Time

No output

<1>

Heatsink Overheat

YES

oH2

Heatsink Overheat Warning

YES

oH3

Motor Overheat

YES

oL3

Overtorque 1

YES

Control Circuit Overvoltage

YES

PASS

MEMOBUS/Modbus Test Mode

Complete

No output

SAFE

Customer Safety

–

MEMOBUS/Modbus Test Mode Fault

YES

SoH

Snubber Discharge Resistor Overheat

YES

SrC

Phase Order Detection Fault

–