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McQuay AGZ045BS User Manual

McQuay AGZ045BS
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70 AGZ 026B through 130B IOMM AGZ-5
NOTE: The inverter 7-segment display shows lower case “b” and “d,” meaning the same as the
upper case letters “B” and “D” used in this manual (for uniformity “A to F”).
NOTE: The Store Key saves the edited parameter (shown in the display) to the EEPROM in the
inverter, regardless of the programming device. Upload and download of parameters is
accomplished through a separate command—do not confuse Store with Download or Upload.
Troubleshooting Tips
The table below lists typical symptoms and the corresponding solution(s).
Symptom
Condition
Probable Cause Solution
Is the frequency command source A_01
parameter setting correct?
Is the Run command source A-02
parameter setting correct?
Make sure the parameter setting A-01 is
correct.
Make sure the parameter setting A-02 is
correct.
Is power being supplied to terminals [L1],
[L2], and [L3/N]? If so, the POWER lamp
should be ON.
Check terminals [L1], [L2], and [L3/N], then
[U/T1], [V/T2], and [W/T3].
Turn ON the power supply or check fuses.
Is there an error code E X X displayed? Press the Func. key and determine the error
type. Eliminate the error cause, then clear the
error (Reset).
Are the signals to the intelligent input
terminals correct?
Is the Run Command active?
Is the {FW] terminal (or [RV]) connected to
[P24] (via switch, etc.)
Verify the terminal functions for C_01 – C_05
are correct.
Turn ON Run Command enable.
Supply 24V to {FW] or [RV] terminal, if
configured.
Has the frequency setting for F_01 been
set greater than zero?
Are the control circuit terminals [H], [O],
and [L] connected to the potentiometer?
Set the parameter for F_01 to a safe, non-
zero value.
If the potentiometer is the frequency setting
source, verify voltage at [O] > 0V.
The inverter
outputs [U],
[V], [W] are
not supplying
voltage.
Is the RS (reset) function or FRS (free-run
stop) function ON?
Turn OFF the command(s).
Inverter
outputs [U],
[V], [W] are
supplying
voltage.
Is the motor load too heavy? Reduce load, and test the motor
independently.
The
motor
will not
run.
The optional
remote
operator is
used (SRW).
Are the operational settings between the
remote operator and the inverter unit
correct?
Check the operator type setting.
Are the connections of output terminals
[U/T1], [V/T2], and [W/T3] correct?
Is the phase sequence of the motor
forward or reverse with respect to [U/T1],
[V/T2], and [W/T3]?
Make connections according to the phase
sequence of the motor. In general:
FWD = U-V-W, and
REV = U-W-V.
The direction of the motor
is reversed.
Are the control terminals [FW] and [RW]
wired correctly?
Is parameter F_04 properly set?
Use terminal [FW] for forward, and [RV] for
reverse.
Set motor direction in F_04.
If using the analog input, is the current or
voltage at [O] or [OI]?
Reduce the load.
Heavy loads activate the overload restriction
feature (reduces output as needed).
Is the load too heavy? Reduce the load
Heavy loads activate the overload restriction
feature (reduces output as needed).
The motor speed will not
reach the target
frequency (desired
speed).
Is the inverter internally limiting the output
frequency?
Check max frequency setting (A_04).
Check frequency upper limit setting (A_61).
Continued on next page.

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McQuay AGZ045BS Specifications

General IconGeneral
BrandMcQuay
ModelAGZ045BS
CategoryChiller
LanguageEnglish

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