Yaskawa Z1000 AC Drive HVAC User Manual

Page 209

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Digital Operator Display

Fault Name

TdE

Time Data Error

Cause

Possible Solution

An error has occurred in the Real-Time Clock

function of the HOA keypad

Replace the HOA keypad. For replacment instructions, contact Yaskawa or your nearest sales

representative.

Digital Operator Display

Fault Name

TIE

Time Interval Error

Cause

Possible Solution

An error has occurred in the Real-Clock Time

function of the digital operator

Replace the digital operator. For instructions on replacing the digital operator, contact Yaskawa or your

nearest sales representative.

Digital Operator Display

Fault Name

TIM

Time Not Set

Cause

Possible Solution

The Real-Time Clock for the digital operator

is not set in parameter o4-17
• The drive is a new drive, first power-up

condition

• o4-17 was set to 2, Reset, by the user,

manually clearing the Real-Time Clock

data.

Set o4-17 to 1 to set the time for the digital operator.

The drive will display the "TIM" alarm (Time Not Set) when the Real time Clock is not set . Additionally,

at power up, if the "TIM" condition is present, the drive will automatically switch to the time setting

screen (o4-17 = 1) for 30 seconds to prompt the user to set the Real-Time Clock.

The user did not set the Real Time Clock when

prompted following power-up.

Cycle power to the drive and set the Real Time Clock within 30 seconds of power-up, or set the clock

manually via parameter o4-17.

The digital operator battery is low or the

battery has been replaced

Replace the digital operator battery and set the Real-Time Clock.

An error has occurred in the Real-Time Clock

function of the digital operator

Replace the digital operator. For instructions on replacing the digital operator, contact Yaskawa or your

nearest sales representative.

Digital Operator Display

Fault Name

UL3

Undertorque Detection 1
The current has fallen below the minimum value set for torque detection (L6-02) for longer than the

allowable time (L6-03).

Cause

Possible Solution

Parameter settings are not appropriate for the

load

Check the settings of parameters L6-02 and L6-03.

There is a fault on the machine side

Check the load for any problems.

Digital Operator Display

Fault Name

UL6

Motor Underload
The weight of the load has fallen below the underload curve defined in L6-14.

Cause

Possible Solution

The output current has fallen below the motor

underload curve defined in L6-14 for longer

than the time set to L6-03

Adjust the value set to L6-14 so that output current remains above the motor underload curve during

normal operation.

Digital Operator Display

Fault Name

Uv1

DC Bus Undervoltage
One of the following conditions occurred while the drive was running:
• Voltage in the DC bus fell below the undervoltage detection level (L2-05).
• For 600 V class drives: approximately 475 V
The fault is output only if L2-01 is set to 0 or 1 and the DC bus voltage has fallen below the level set to

L2-05 for longer than the time set to L2-02.

Cause

Possible Solution

Input power phase loss

• The main circuit drive input power is wired incorrectly.
• Correct the wiring.

One of the drive input power wiring terminals

is loose

• Ensure there are no loose terminals.
• Apply the tightening torque specified in this manual to fasten the terminals.

Refer to Main Circuit

Wire Gauges and Tightening Torque on page 81

for details.

5.4 Fault Detection