Honeywell NX Pocket Programming Manual

NX Series Inverters

HVAC Pocket Programming Guide

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HVAC Pocket Programming Guide

This guide provides a single reference document for the user of NXL HVAC (product codes
starting with HVAC) and NXS (product codes starting with NXS) inverters, when using
Basic Speed Control and PID Control in HVAC applications.

Contents



Introduction 03



NXL HVAC Inverter Connections 04

Information on control connections of NXL HVAC inverters



NXS Inverter Connections 05

Information on control connections of NXS inverters



Operating the NXL HVAC Keypad 06

Information and tips on operating the keypad



NXL HVAC Basic Speed Control 08

Commissioning and operation in Basic Speed Control



NXL HVAC PID Control 10

Commissioning and operation in PID Control



Operating the NXS Keypad 12

Information and tips on operating the keypad



NXS Basic Speed Control 14

Commissioning and operation in Basic Speed Control



NXS PID Control 16

Commissioning and operation in PID Control



Inverter Fault Tracing 18

Fault codes, possible causes and correcting measures for both product series

HVAC Pocket Pro

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Guide / Contents

02

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Introduction

Basic Speed Control

PID Control

Variable Frequency Drive

Control System

Motor

Fan

or

Pump

Load

Pressure
Sensor

Setpoint Signal

V signal to AI1
mA signal to AI2

V signal to AI1
mA signal to AI2

Pump

Fan

or

Load

Pressure
Sensor

Control System Variable Frequency Drive

Motor

Speed Signal
V signal to AI1
mA signal to AI2

Introduction

03

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NXL HVAC Inverter Connections

Installation and Power Connections

See the NXL HVAC Quick Guide and NXL HVAC Safety Guide (attached to each drive)
for information on installation, cabling, cooling, power connections and safety. More
information can be found in the NXL HVAC User’s Manual, which can be downloaded from

http://www.inettrack.europe.honeywell.com/support.

Control Terminal Connections

1 + 10 V

ref

Reference output

(voltage for potentiometer etc.)

2 AI1 + Analogue Input 1 (V signal)

3 AI1 – I/O Ground

4 AI2 +

5 AI2 –

Analogue Input 2 (mA signal)

6 +24 V +24 V output (max. 0.1 A)

7 GND I/O ground

8 DIN1 Digital Input 1 (Start forward)

9 DIN2 Digital Input 2

(Start reverse)

10 DIN3 Digital Input 3

(Preset speed 1,
default: 10 Hz)

11 GND I/O Ground

18 AO1 +

19 AO1 –

Analogue output 1
Range 0–20 mA/RL,
max. 500

Ω

A RS485

B RS485

Modbus RTU, serial bus

30 +24V Input for +24 V backup voltage

12 + 24 V +24 V output (max. 150 mA)

13 GND I/O ground

14 DIE1 Exp. Digital Input 1 (Preset

speed 2, default: 50 Hz)

15 DIE2 Exp. Digital Input 2

(Fault Reset)

16 DIE3 Exp. Digital Input 3

(Disable PID)

25 ROE1

26 ROE1

Exp. Relay 1
NO (run)

28 TI+

29 TI –

Thermistor Input;
Rtrip = 4.7 k1Ω (PTC)

21 RO1

22 RO1

23 RO1

Relay 1
NO/NC
(fault)

NXL HVAC Inverter Connections

04

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NXS Inverter Connections

Installation and Power Connections

See the NX Series User’s Manual (included with every shipment) for information on
installation, cooling, power connections and safety. The manual can also be downloaded
from http://www.inettrack.europe.honeywell.com/support.

Control Terminal Connections

1 +10 V

ref

Reference output (voltage for

potentiometer etc.)

2 AI1 + Analogue Input 1 (V signal)

3 AI1 – I/O ground

4 AI2 +

5 AI2 –

Analogue Input 2 (mA signal)

6 +24 V +24 V input/output (max. 0.1 A)

7 GND I/O ground

8 DIN1 Digital Input 1

9 DIN2 Digital Input 2

10 DIN3 Digital Input 3

11 CMA Digital input common for DIN1,

DIN2 and DIN3

12 +24 V Same as terminal 6

13 GND I/O ground

14 DIN4 Digital Input 4

15 DIN5 Digital Input 5

16 DIN6 Digital Input 6

17 CMB Digital input common for DIN4,

DIN5 and DIN6

18 AO1 +

19 AO1 –

Analogue output 1, default
range: 0–20 mA/RL, max.
500 Ω

20 DO1 Open collector Output

21 RO1

22 RO1

23 RO1

Relay 1
NO/NC

25 RO2

26 RO2

Relay 2
NO

28 TI+

29 TI-

Thermistor Input;
Rtrip = 4.7 kΩ (PTC)

NXS Inverter Connections

05

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Operating the NXL HVAC Keypad

Reading the Display

Keypad Push-Buttons

RUN and STOP

Indicate if the drive is
running. When RUN
blinks, STOP command
has been given but the
motor is still rotating.

A

LARM

Lights up to warn that the drive is running outside
a certain limit.

FAULT

Indicates that unsafe operating conditions caused
the drive to stop.

CONTROL PLACE

A

ctive control place is visible: keypad, I/O or

fieldbus.

NUMERIC INDICATIONS

Provide information on values and location in the
menu structure.

UNIT

Unit of the value on screen visible.

READY

Lights up when AC power is on. In case of a fault,
the symbol will not light up.

DIRECTION

Active motor
direction visible:
forward or
reverse.

ENTER

- Confirmation of selections

- Fault history reset (2 – 3 s)

RESET

Reset active faults

Note: The motor may start immediately after

resetting the fault!

RIGHT

- In menu: move forward

- In parameter edit mode: move cursor right

- Enter edit mode

START and STOP

Control the motor if the keypad is the active control

Tip: Hold STOP down 5 s to launch the

START UP WIZARD

LEFT

- In menu: move backward

- In parameter edit mode: move cursor left

- Exit edit mode

Tip: Hold LEFT down 3 – 5 s for

control place change
KEYPAD  REMOTE

UP+ and DOWN

–

- Browse the pages in main and submenus

- Edit values

O

p

eratin

g

the NXL HVAC Ke

yp

ad

06

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