Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 215)

No. Name Setting Range Default
Z1-40 Auto Transfer Wait Time 0.0 to 300.0 s 0.0 s
n Z1-41: HAND Speed Reference Selection
Selects the frequency reference source when in HAND Mode.
No. Name Setting Range Default
Z1-41 HAND Speed Reference Selection 0, 1 0
Setting 0: Parameter Z1-09
Parameter Z1-09 sets the frequency reference for the drive when in HAND Mode.
Setting 1: Analog
An analog input sets the frequency reference when in HAND Mode.
Note: 1. Set H3-02 to “1F - HAND Mode” when using Terminal A1 for HAND Mode frequency reference.
2. Set H3-10 to “1F - HAND Mode” when using Terminal A2 for HAND Mode frequency reference.
3. Set H3-06 to “1F - HAND Mode” when using Terminal A3 for HAND Mode frequency reference.
n Z1-42: Bypass Device Type
Selects either contactor or soft-starter bypass type. This parameter should be set to 1 at the factory on bypasses with the soft-
starter option PW. It is not necessary for the customer to adjust this setting.
No. Name Setting Range Default
Z1-42 Bypass Device Type 0, 1 0
Setting 0: Contactor
The cabinet blowers operate only when the drive is running.
Setting 1: Soft Starter
The cabinet blowers operate in drive and bypass run modes.
n Z1-50: Bypass Unbalanced Current Detection Level
Sets the current unbalance level between phases as a percentage of parameter E2-01 when operating in Bypass Mode. This
function is used in conjunction with parameter Z1-51 to detect input or output phase loss during bypass operation.
The unbalance level is determined by measuring the RMS current in each of the output phases. The amount of current unbalance
between the phases is calculated using the following formula:
Unbalance Level = (I
(max)
- I
(min)
) / I
(max)
× 100%
When the unbalance level exceeds the Z1-50 setting for longer than the time set to Z1-51, an “FB15 – Input Phase Loss” fault
is triggered and the drive will coast to stop.
This parameter rarely needs to be changed.
No. Name Setting Range Default
Z1-50 Bypass Unbalanced Current Detection Level 5.0 to 50.0% 25.0%
n Z1-51: Bypass Unbalance Trip Time Detection Level
Sets the trip time for an unbalance condition when operating in Bypass Mode. This function is used in conjunction with
parameter Z1-50 to detect input or output phase loss during bypass operation.
Note: Setting this parameter to 0.0 will disable unbalance (bypass phase loss) protection.
No. Name Setting Range Default
Z1-51 Bypass Unbalance Trip Time Detection Level 0.0 to 30.0 s 5.0 s
n Z1-52: Bypass Phase Rotation
Input phase rotation is ignored when operating in Drive Mode. Input phase rotation determines motor direction when operating
in Bypass Mode.
If input phase rotation is reversed and this parameter is set to 1, an “AL16 – Inp Phase Rotation” alarm will be displayed when
operation starts in Bypass Mode and operation continues.
5.14 Z: Bypass Parameters
YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual 215
5
Programming