
L3: Stall Prevention ......................................................................................................................... 152
L4: Reference Detection.................................................................................................................. 154
L5: Fault Restart.............................................................................................................................. 155
L6: Torque Detection....................................................................................................................... 158
L8: Drive Protection......................................................................................................................... 160
5.9 n: Special Adjustments.....................................................................................................162
n1: Hunting Prevention.................................................................................................................... 162
n3: Overexcitation Braking .............................................................................................................. 162
5.10 o: Operator-Related Settings ...........................................................................................163
o1: HOA Keypad Display Selection................................................................................................. 163
o2: HOA Keypad Functions............................................................................................................. 165
o4: Maintenance Monitor Settings................................................................................................... 165
5.11 S: Special Parameters.......................................................................................................167
S1: Dynamic Audible Noise Control Function ................................................................................. 167
S2: Sequence Timers...................................................................................................................... 168
Examples of Sequence Timers ....................................................................................................... 170
5.12 T: Motor Tuning .................................................................................................................174
5.13 U: Monitor Parameters......................................................................................................175
UB: Bypass Monitors....................................................................................................................... 175
U1: Operation Status Monitors ........................................................................................................ 175
U2: Fault Trace................................................................................................................................ 175
U3: Fault History.............................................................................................................................. 175
U4: Maintenance Monitors .............................................................................................................. 175
U5: PID Monitors ............................................................................................................................. 175
U9: Power Monitors......................................................................................................................... 175
5.14 Z: Bypass Parameters.......................................................................................................176
Z1: Bypass Control System............................................................................................................. 176
Z2: Bypass Control Input/Output ..................................................................................................... 187
Z3: Bypass Control Communication................................................................................................ 191
Z4: Ethernet Option Bypass Control................................................................................................ 194
6. DIAGNOSTICS & TROUBLESHOOTING ............................................................ 197
6.1 Section Safety....................................................................................................................198
6.2 Motor Performance Fine-Tuning......................................................................................200
Fine-Tuning V/f Control ................................................................................................................... 200
Parameters to Minimize Motor Hunting and Oscillation .................................................................. 200
6.3 Drive Alarms, Faults, and Errors .....................................................................................201
Types of Alarms, Faults, and Errors................................................................................................ 201
Alarm and Error Displays ................................................................................................................ 202
6.4 Fault Detection ..................................................................................................................205
Fault Displays, Causes, and Possible Solutions ............................................................................. 205
6.5 Alarm Detection.................................................................................................................221
Alarm Codes, Causes, and Possible Solutions ............................................................................... 221
6.6 Operator Programming Errors .........................................................................................229
Operator Programming Error Codes, Causes, and Possible Solutions........................................... 229
6.7 Auto-Tuning Fault Detection ............................................................................................232
Auto-Tuning Codes, Causes, and Possible Solutions..................................................................... 232
6.8 Diagnosing and Resetting Faults.....................................................................................234
Table of Contents
6YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual