Trane ADAPTIVE CONTROL UCM-CLD Installation And Maintenance Manual

Installation
Operation
Maintenance

UCM-CLD
Operating and control
principles

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These Installation, Operation, and Maintenance
instructions are given as a guide to good practice in the
installation, start-up, operation, and periodic
maintenance by the user of UCM-CLD modules.

WWaarrrraannttyy

Warranty is based on the general terms and conditions
of the manufacturer. The warranty is void if the
equipment is modified or repaired without the written
approval of the constructor, if the operating limits are
exceeded, or if either the control system or the
electrical wiring is modified.

RReecceeppttiioonn

On arrival, inspect the unit before signing the delivery
note. Specify any damage on the delivery note, and
send a registered letter of protest to the last carrier of
the goods within 72 hours of delivery. Notify the local
sales office at the same time.
The unit should be totally inspected within 7 days of
delivery. If any concealed damage is discovered, send a

They do not contain the full service procedures
necessary for the continued successful operation of this
equipment. The services of a qualified service
technician should be employed, through the medium of
a maintenance contract with a reputable service
company.

Damage due to misuse, lack of maintenance, or failure
to comply with the manufacturer's instructions, is not
covered by the warranty obligation.

registered letter of protest to the carrier within 7 days
of delivery and notify the local sales office.
Units are shipped with the refrigerant operating or
holding charge, and should be examined with an
electronic leak detector to determine the hermetic
integrity of the unit. The refrigerant charge is not
included in the standard Warranty Cover.

GGeenneerraall iinnffoorrmmaattiioonn

About this manual

Cautions appear at appropriate places in this
instruction manual. Your personal safety and the
proper operation of this machine require that you
follow them carefully.

The manufacturer assumes no liability for installations
or servicing performed by unqualified personnel.

© American Standard Inc. 2000

2

IInnddeexx

Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Principles of operation of the UCM-CLD module

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Operator’s interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Description of the operation

Chiller report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Refrigerant report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Compressor report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Operator’s settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Service settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Service tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Diagnostics

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Default description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Unit operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Compressor operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Maintenance contract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3

Compressor

Report

Refrigerant

Report

Chiller
Report

Custom

Report

Select Report Group

Diagnostics

Service

Tests

Service

Settings

Operator

Settings

Alarm

AutoEnterPrevious

StopCancelNext

Select Setting Group

ADAPTIVE CONTROL™

Principles of operation of the module UCM-CLD

Figure 1: Operator’s interface

General information

This regulation assembly is composed of 6 electronic
modules which have each their own 115V power
supply and communicate with each other via a serial
link. Each module has a set of functions which are
associated to make the unit regulation.
Each module has the following name linked to its
functions.

- MCSP (Motor Compressor Start and Protection):
safety, protection and control of the helical-rotary
compressor as well as all associated components.

- CPM (Chiller Protection and Management): safety,
protection, and control of the chiller.

- EXV (Electronic Expansion Valve): control of both
electrical expansion valves.

- CSR (Communication and Setpoint Reset): control of
the serial communication, unit external setpoints, and
ice-making mode (optional module).

- Local CLD (Local Clear Language Display): operator’s
interface located in the unit: front panel (software
version and number displayed at power-up).

- Remote LCD (Remote Clear Language Display):
operator’s interface located up to 1500 m from the
unit at the operator’s, and which can communicate
with up to four units of the same type (optional
module).

- TCI IV, IPCB (Tracer Communication Interface 4,
Inter-Processor Communication Buffer): protection of
the unit internal communication bus from the external
interferences existing in the unit (optional module,
compulsory when using a remote CLD, and which
must be factory-mounted).

4

Figure 2: Control and regulation panel mounted on helical-rotary units equipped with UCM-CLD

Operator’s interface (Figure 1)

Digital display

The display of control regulation and operating
parameters, as well as diagnostic and error messages,
is made on a two-line 40-character liquid crystal
display.
When powering-up the system, the display is not lit
and the message “Self-test in progress” is displayed in
order to make sure the display operates properly.
The screen allows to display:

- The error codes.

- The settings of the various setpoints.

- The specified temperature and pressure values.

- The status of operating parameters and various
options.

Keyboard

A 16-key touch pad allows the operator to move within
the various menus and to modify their parameters and
setpoints.
The keys are divided into two groups.

Menu keys

- Chiller Report menu

- Custom Report menu

- Refrigerant menu

- Compressor menu

- Operator settings menu

- Service settings menu

- Service test menu

- Diagnostics menu
These 8 keys allow to access each of these menus.

Control keys

- + key

- - key

- Previous key

- Next key

- Enter key

- Cancel key

- Auto key

- Stop key
These 8 keys allow the operator to move within the
various menus and to modify their parameters.

Remark: All the menus and setpoints cannot be
accessed by the chillers operator; Service Settings
and Service Test menus are protected by a password
and are reserved for Trane engineers.

5

Description of the operation

The whole information is gathered in various menus
according to the location of the sensor and/or the
function performed.

Chiller report menu

This menu gathers the information relating to the liquid
chiller (reading only). Active setpoints and their origins,
chilled water, air temperature, current draws, are found
in this menu.

Custom report menu

This menu is peculiar because originally it does not
include any information at all. However, the operator
can build his own menu which is comprised of read­only information, by simply pressing the + key when in
other menus. To remove information from this menu,
simply press the - key when displayed.

Refrigerant report menu

This menu gathers the information, read-only, relating
to the refrigerant. Refrigerant pressures and
temperatures at various points of the refrigerant circuit
can be found in this menu.

Compressor report menu

This menu gathers the information, read-only, relating
to the compressor. Voltages and amps, hour and start
counters, as well as oil temperature (GP compressor
only) can be found in this menu.

Operator settings menu

This menu comprises all the particular setpoints and
operating modes existing in the unit and which are
accessible by the usual operator of the chiller. In
addition, the following can be programmed: chilled
water pump operation, temperature resets, ice-making
operation, and low ambient limit.

Service settings menu

This menu has three access levels. The first one
contains information which can be adjusted by the
customer such as the unit voltage, the validation of
over/under voltage protection, the display language,
and the programmable relay function of the units. The
keyboard can also be locked if the relating function is
validated. A second level contains the setpoints
adjusted by the service engineer to adapt the operation
of the unit to a particular site, such as the address of
the serial link, the water and refrigerant limit
parameters, and so forth. The third level contains the
configuration and protection information: number of
circuits, compressors and fans, compressor amps and
expansion valve settings.

Service tests menu

This menu allows the operator to perform some tests
when the unit is in operation or during the initial start­up of the unit: expansion valve test, circuit locking, or
pump-out.

Previous key

Pressing the Previous key allows the operator to
scroll up to the previous information in the current
menu. All the display items are looped, so it is
possible to scroll from the first item to the last one.

Next key

Pressing the Next key allows the operator to scroll
down to the next information in the current menu. All
the display items are looped, so it is possible to scroll
from the last item to the first one.

+ key

If this information displayed is a read-only item,
pressing the + key will add it to the operator’s menu.
if the information can be modified, the value is
increased by 1. Pressing the key for longer than 1
second will increase the value of 1 every .25 seconds.
A logical stop prevents an adjustment higher than the
maximum value; a message is displayed to indicate
this status.

- key

If the information displayed is a read-only item,
pressing the - key will remove it from the operator’s
menu. If the information can be modified, the value is
increased by 1. Pressing the key for longer than 1
second will increase the value of 1 every .25 seconds.
A logical stop prevents an adjustment higher than the
maximum value; a message is displayed to indicate
this status.

Enter key

Pressing this key allows the validation of a value after
it has been modified by pressing the + or - key.

Cancel key

Pressing this key allows the cancellation of a value
after it has been modified by pressing the + or - key
and to come back to the original value.

Auto key

Pressing this key (green) allows the unit to come back
in auto mode if it was previously placed in stop mode
with the stop key. The unit cannot be forced into auto
mode if it has been stopped by an external contact or
the serial link. When the unit is stopped by the remote
interface (Remote CLD), the local “auto” mode order
is prioritary.

Stop key

Pressing this key (red) allows the unit to go into stop
mode. In every case, and wherever the origin (except
a local stop), the stop order and stop status have
priority over a run order. The stop generated is a soft
stop, meaning the unit unloads before stopping.

Diagnostics menu

This menu contains all the information on the current
faults or faults that occurred in the past. It allows the
possibility to reset a manual reset fault or to erase the
historic list of faults.

6

Chiller report

[operating mode] will be one of

Reset
Stopped by Local Display
Stopped by Remote Display
Stopped by Tracer
Stopped by External Source
Auto
Waiting, Restart Inhibit
Starting
Running
Running, Current Limit
Running, Condenser Limit
Running, Evaporator Limit
Stopping
Making ice
ice-making complete
Low ambient temperature lockout
Electronic expansion valve test
Manufacturing test
Service pumpdown

Chiller

report

Chiller report: status, water temperatures and setpoints

“Press (Next) (Previous) to continue”

Next

Unit model

(service setting menu)

all others RTXA

Mode: [OPERATING MODE]
Request setpoint source: [SETPOINT SOURCE]

Chiller Mode: [OPERATING MODE]
Request setpoint source: [SETPOINT SOURCE]

Heat Mode: [OPERATING MODE]
Request setpoint source: [SETPOINT SOURCE]

Next

Compressors on A, B, C, D, NONE
Circuits locked out CIRCUIT 1, CIRCUIT 2, NONE

Next

[Operating mode]
Making ice,
ice-making complete All others

Next

Next

Active ice termination setpoint XXX C
Evaporator entering water temperature XXX.X C

Active chilled water setpoint XXX C
Evaporator leaving water temperature XXX.X C

Active hot water setpoint XXX C
Leaving water temperature XXX.X C

Next

Evaporator entering water temperature XXX.X C
Evaporator leaving water temperature XXX.X C

Next

Fan control

(Service Setting Menu)

Disable Enable

Condenser entering water temperature XXX.X C
Condenser leaving water temperature XXX.X C

Water heat recovery entering water temperature XXX.X C
Water heat recovery leaving water temperature XXX.X C

Next

* Dashes will be displayed if the sensor is open

or shorted and neither outdoor air reset or
low ambient lockout is enabled.

** Dashes will be displayed if the zone

temperature sensor is open or shorted or
zone reset is disabled.

Active current limit setpoint XXX %
Chiller % Rated load amps XXX %

Next

* Outdoor air temperature XXX.X C
** Zone temperature XXX.X C

Next

7

Refrigerant report

The possible replacement to

Cooling
Heating
Defrosting
Heat to Defrost
Defrost to Heat
Cool to Heat
Heat to Cool

Refrigerant

report

Refrigerant temperature and pressure report

“Press (Next) (Previous) to continue”

Next

All others RTXA

Circuit 1 Circuit Mode: [Circuit mode]

Next

Circuit 1 evaporator refrigerant pressure XXX bar
Circuit 1 condenser refrigerant pressure XXX bar

Next

Circuit 1 compressor suction refrigerant temperature XXX.X C
Circuit 1 saturated evaporator refrigerant temperature XXX.X C

Next

Circuit 1 saturated condenser refrigerant temperature XXX.X C

Next

All others RTXA

Circuit 2 Circuit Mode: [Circuit mode]

Next

Circuit 2 evaporator refrigerant pressure XXX bar
Circuit 2 condenser refrigerant pressure XXX bar

Next

Circuit 2 compressor suction refrigerant temperature XXX.X C
Circuit 2 saturated evaporator refrigerant temperature XXX.X C

Next

Circuit 2 saturated condenser refrigerant temperature XXX.X C

Next

8

Compressor report

* Display will change according to compressor

reviewing

Compressor A mode
Compressor B mode
Compressor C mode
Compressor D mode

[MODE]

Stopped
Locked out
Waiting for restart inhibit time
Starting
Running
Run-condenser limit
Run-evaporator limit
Run-current limit
Stopping
Service pumpdown

Compressor

report

Compressor report: Mode, Hours, Starts, Rated load amps

“Press (Next) (Previous) to continue”

Next

Compressors on A, B, C, D, NONE
Circuits locked out Circuit 1, Circuit 2, NONE

Next

% line volts XXX %

Next

* Compressor A mode [MODE]

Next

Compressor A % Rated load amps, average XXX %
Compressor A % Rated load amps, high phase XXX %

Next

Tonnage of unit

130-400 Tons 70-125 Tons

Compressor A entering oil temperature XXX C

Next

Compressor A starts XXXXX
Compressor A running hours XXXXX

Next

After review of last compressor Compressor B, C, D

9

Operator settings

[SOURCE]
Local
Tracer

Default = 6.7°C
Select = - 17.8 to 18.3°C
* If “Limited by cutout setpoint, (+) to change” is
displayed, refer to the section on “Leaving water
temperature cutout” and “Low refrigerant
temperature cutout.”

Default = Disable

Default = 5.5 °C
Select = -16 to +2°C
This is difference between the entering and
leaving chilled water temperature.

Operator

settings

Chiller operation settings and setpoints

“Press (Next) (previous) to continue”

Next

Setpoint source [SOURCE]

“Press (+) (-) to change setting”

Next

All others RTXA

Front panel chilled water setpoint XXX C

“Press (+) (-) to change setting”

Next

External chilled water setpoint [Disable/Enable]

“Press (+) (-) to change setting”

Next

Design delta temperature setpoint XXX C

“Press (+) (-) to change setting”

Front Panel Chilled Water Setpoint XXX C

“Press (+) (-) to change setting”

Default = 1.1°C
Select = 16.6 to 1.1°C
The temperature which is added the chilled water
setpoint, at which the chiller will start.

Front Panel Hot Water Setpoint XXX C

“Press (+) (-) to change setting”

External Chilled Water Setpoint [Disable/Enable]

“Press (+) (-) to change setting”

External Hot Water Setpoint [Disable/Enable]

“Press (+) (-) to change setting”

Cooling Design Delta Temperature Setpoint XXX C

“Press (+) (-) to change setting”

Heating Design Delta Temperature Setpoint XXX C

“Press (+) (-) to change setting”

Differential to start setpoint XXX C

“Press (+) (-) to change setting”

Next

10

Default = ON. Manual override of chilled water
pump off delay
AUTO = activates the “Chilled water pump off
delay”

[MINUTES]
Default = 10 minutes
Select = 1 minute to 30 minutes
The time period that the chilled water pump will
run, once the stop signal is given to the chiller.

Default = 120%
Select = 40% to 120%

Chilled water pump [ON, AUTO]

“Press (+) (-) to change setting”

Next

Chilled water pump off delay [MINUTES]

“Press (+) (-) to change setting”

Next

Front panel current limit setpoint XXX %

“Press (+) (-) to change setting”

Next

Default = Disable

Default = Disable

Default = -6.6°C
Select: -28°C to 16°C

External current limit setpoint [Disable/Enable]

“Press (+) (-) to change setting”

Next

Low ambient lockout [Disable/Enable]

“Press (+) (-) to change setting

Next

Low ambient lockout

(Operator settings menu)

Enable Disable

Low ambient lockout setpoint XXX C

“Press (+) (-) to change setting

Next

11

Default = Disable
Select = Return water
Zone
Outdoor air

Chilled water reset type [TYPE]

“Press (+) (-) to change setting”

Next

Type of chilled water reset selected above

Return water
Zone
Outdoor air Disable

[TYPE]
Return water

Default = 50%
Range = 10% to 120%

Zone

Default = 100%
Range = 50% to 300%

Outdoor

Default = 10%
Range = -80% to 80%

[TYPE]
Return:

Default = 2,7°C
Range = 0° to 11°C

Zone

Default = 25°C
Range = 10 to 55°C

Outdoor

Default = 32°C
Range = 10 to 55°C

[TYPE]
Return water

Default = 2,7°C
Range = 0° to 11°C

Zone

Default = -15°C
Range = 0° to 11°C

Outdoor

Default = 2,7°C
Range = 0° to 11°C

Default = Disable

[TYPE] type, reset ratio XXX %

”Press (+) (-) to change setting”

Next

[TYPE] type, start reset setpoint XXX C

“Press (+) (-) to change setting”

Next

[TYPE] type, max reset setpoint
“Press (+) (-) to change setting”

Next

Ice machine control [Disable/Enable]

“Press (+) (-) to change setting”

Default = -3°C
Select = -7 to -1°C

Panel ice termination setpoint XXX F

“Press (+) (-) to change setting”

Next

12

Service settings

Service
settings

Service settings, enable and units

“Press (Next) (Previous) to continue”

Next

Status of keypad/display lock feature

(Service setting menu)

Enable Disable

“Press (Enter) to lock display and keypad”

password will be required to unlock

* If the keypad is locked and a diagnostic occurs,

the alarm light will flash if applicable but the
diagnostic screen will not be displayed until the
keypad is unlocked.

** Once the keypad is locked the “PREVIOUS” and

“ENTER” key need to be pressed simultaneously
to unlock the keypad.

Default = Disable
The optional under/over voltage transformer is
needed for this feature.

Default = 460
Selections = 200, 220, 230, 346, 380, 415, 460, 500,

575.

Default = 120 seconds
select = 30 to 120 seconds
The time period between power-up or stop and the
initiation of the compressor start sequence, when
there is a call for cooling.

Default = Disable

Next

Depress either Enter or Next

Enter

*

***DISPLAY AND KEYPAD ARE LOCKED ***

*** ENTER PASSWORD TO UNLOCK ***

** Previous Enter

Display will return to

“Chiller operating mode”

under chiller report

Under/Over voltage protection [Disable/Enable]

“Press (+) (-) to change setting”

Next

Unit line voltage [VOLT] V

“Press (+) (-) to change setting”

Next

Restart inhibit time XXX SEC

“Press (+) (-) to change setting”

Next

Balanced compressor start and hours [Disable/Enable]

“Press (+) (-) to change setting”

Next

[UNITS]
SI
English

[LANGUAGE]
English / Français / Espanol / Nippon / Italiano /
Deutsch / Nederlands

Default = 1
Select = 1 to 12

Default = Disable

Next

Display units [UNITS]

“Press (+) (-) to change setting”

Next

Language [LANGUAGE]

“Press (+) (-) to change setting”

Next

** Programmable relay setup XX

“Press (+) (-) to change setting”

Next

External circuit lockout [Disable/Enable]

“Press (+) (-) to change setting”

Next

*** Password required for further access

“Please enter password”

Next

13

Service tests

Service

tests

Service tests: pumpdown, electronic expansion valve,

compressor, lockout

“Press (Next) (Previous) to continue”

Next

Default = Disable
Must be manually enabled by sevice personnel
from the UCM. The unit must be in STOP/RESET
and can be performed only once for every power­up of the UCM. Restart inhibit will be prepositioned
and the compressor selected will start and run for
one minute. Manual closing of the liquid line angle
valve will be required.

Default = Disable

Default = Disable

Default = Disable

Service pumpdown, compressor A [Disable/Enable]

“Press (+) (-) to change setting”

Next

Is there a compressor B ?

Yes No

Service pumpdown, compressor B [Disable/Enable]

“Press (+) (-) to change setting”

Next

Is there a compressor C ?

Yes No

Service pumpdown, compressor C [Disable/Enable]

“Press (+) (-) to change setting”

Next

Is there a compressor D ?

Yes No

Service pumpdown, compressor D [Disable/Enable]

“Press (+) (-) to change setting”

Default = Disable
Electronic expansion valve test will be initiated
when the unit is in STOP/RESET and Electronic
expansion valve test is set to enable. The mode will
automatically be reset to disable upon completion
of the test.

Default = Disable

Default = Disable
Allows service personnel to override the lead/lag
function and start the compressor of concern. After
the compressor starts, the display will
automatically return to “D.”

Default = Disable

Next

Electronic expansion valve test, circuit 1

“Press (+) (-) to change setting”

Next

Electronic expansion valve test, circuit 2

“Press (+) (-) to change setting”

Next

Compressor test, compressor A [Disable/Enable]

“Press (+) (-) to change setting”

Next

Is there a compressor B ?

Yes No

Compressor test, compressor B [Disable/Enable]

“Press (+) (-) to change setting”

Next

Is there a compressor C ?

Yes No

Default = Disable

Compressor test, compressor C [Disable/Enable]

“Press (+) (-) to change setting”

Next

14

Is there a compressor D ?

Yes No

Default = Disable

Default = UNLOCK
If the setting is changed to “LOCKOUT,” the circuit
will become non-operational. The setting must be
manually changed to “UNLOCK” to regain
operation of the circuit.

Default = UNLOCK

Compressor test, compressor D [Disable/Enable]

“Press (+) (-) to change setting”

Next

Circuit lockout, circuit 1 [UNLOCK/LOCKOUT]

“Press (+) (-) to change setting”

Next

Circuit lockout, circuit 2 [UNLOCK/LOCKOUT]

“Press (+) (-) to change setting”

Next

15

Diagnostics

If there are no diagnostic messages, the selected menu
item will be displayed continuously. If the diagnostics
key is pressed and there are no active diagnostics, the
readout on the display will be:

NO ACTIVE DIAGNOSTICS PRESENT

When a system malfunction occurs, one of the
following appropriate diagnostic messages will be
displayed:

*** A machine shutdown has occurred ! ***

A machine shutdown occurred

but has cleared “press (Next)”

*** A circuit shutdown has occurred ! ***

A circuit shutdown occurred

but has cleared “press (Next)”

*** Informational warning ***

An informational warning occurred

but has cleared “press (Next)”

When a circuit shutdown - manual reset (CMR) or a
machine shutdown - manual reset (MMR) occurs, the
red LED to the right of the display will flash. Otherwise
this alarm LED is de-energized.

If more than one diagnostic is present, only the highest
priority active diagnostic will be explained in detail. For
example, if the diagnostics occur in the following order
before the operator returns - IFW, MMR, CMR - the
display will read:

*** A machine shutdown has occurred ! ***

because the MMR has the highest priority. However, as
the operator moves through the diagnostic menu to the
“Last diagnostic,” the [Diagnostic description] will
show the CMR diagnostic as well as the IFW. If the
“Next” key is pressed, the display will show all the
other active and historic diagnostics.

The active diagnostic priorities, listed from highest to
lowest are:

Machine shutdown - manual reset (MMR)

Machine shutdown - automatic reset (MAR)

Circuit shutdown - manual reset (CMR)

Circuit shutdown - automatic reset (CAR)

Informational warning (IFW)

The following flowchart shows the display readouts
found under the diagnostics menu. By following the
steps shown in the flowchart, a brief description of the
diagnostic can be viewed. Use the Next key to enter the
main diagnostic menu, where the diagnostic can be
cleared.

16

Diagnostics

Note:

MMR: Machine shutdown manual reset.
MAR: Machine shutdown automatic reset.

CMR: Circuit shutdown manual reset.
CAR: Circuit shutdown automatic reset.
IFW: Informational warning.

Diagnostics

Diagnostic present

Yes

Type of diagnostic

MMR/MAR Active

*** A machine shutdown has occurred ! ***

“Press (Next) for diagnostic info”

Next

Type of machine shutdown

MMR

[Diagnostic description]

Latched fault - manual reset required

Next

All others RTXA

Mode at fault: [OPERATING MODE]
Compressors running at fault: [A, B, C, D]

No

Other

MAR

[Unit operating mode]

Cooling Mode
Heating Mode
Defrost Mode

[Unit operating mode] [Operating mode]
Compressors running at fault: [A, B, C, D]

Next

Press (Enter) to reset control

and clear all active diagnostics

Enter

Next

Press Enter or Next

Enter

Machine will unload if loaded
and display will automatically

return to “MODE” in the chiller report

[DIAGNOSTIC DESCRIPTION]

Active fault - May clear automatically

Next

All others RTXA

Mode at fault: [Operating mode]
Compressors running at fault: [A, B, C, D]

[Unit operating mode] [Operating mode]
Compressors running at fault: [A, B, C, D]

Type of diagnostic

MAR inactive

*** A circuit shutdown has occurred ! ***

Press (Next) for diagnostic information”

17

Other

Next

Note:

MMR: Machine shutdown manual reset.
MAR: Machine shutdown automatic reset.

CMR: Circuit shutdown manual reset.
CAR: Circuit shutdown automatic reset.
IFW: Informational warning.

Type of diagnostic

CMR/ CAR active

Latched fault - manual reset required

“Press (Next) for more”

Type of circuit shutdown

Latched fault - manual reset required

“Press (Next) for more”

Did diagnostic occur

on Circuit 1 or Circuit 2?

Circuit 1

Press (Enter) to

reset circuit 1 diagnostics

Other

Next

CAR

CMR

Next

Circuit 2

Next

Next

Next

Next

Enter

Reset Circuit 1 diagnostic

Press (Enter) to

reset circuit 2 diagnostics

Enter

Reset Circuit 2 diagnostic

Active fault - can clear automatically

“Press (Next) for more”

Other

Type of diagnostic

CAR inactive

A circuit shutdown occurred

but has cleared “Press (Next)”

IFW inactive

Type of diagnostic

18

IFW active

*** Informational warning ***

“Press (Next) for diagnostic info”

Next

Next

An informational warning occurred

but has cleared “Press (Next)”

No active diagnostics present

“Press (Next) (Previous) to continue”

Next

Are there diagnostics

in history ?

Diagnostic status report follows

“Press (Next) (Previous) to continue”

Next

Last diagnostic:

[DIAGNOSTIC DESCRIPTION]

No

Yes

Next

Next

Next

[DIAGNOSTIC DESCRIPTION]

[DIAGNOSTIC TYPE]

No historic diagnostics present

“Press (Next) (Previous) to continue”

Next

Press (Enter) to

clear diagnostic history

Next

Press (Enter) to

reset circuit 1 diagnostics

Next

Press (Enter) to

reset circuit 2 diagnostics

Next

Press (Enter) to reset control

and clear all active diagnostics

Next

Press Enter or Next

19

Enter

Machine will unload if loaded and

display will automatically return to

“MODE” in the chiller report.

Defaults description

Fault 87
Check External Chilled Water Setpoint: IFW - Value out of range

Fault 89
Check External Current Limit Setpoint: IFW - Value out of range

Fault 8A
Chilled Water Flow (Entering Water Temperature): MMR 1) Entering water temperature

< leaving water temperature

2) No water flow

3) Defective Evaporator sensor
Fault 8E
Evaporator Entering Water Temperature Sensor: MMR - Defective sensor

Fault 8F
Condenser Refrigerant Temperature Sensor - Circuit 1: MMR - Defective sensor

Fault 90
Condenser Refrigerant Temperature Sensor - Circuit 2: MMR - Defective sensor

Fault 93
Evaporator Refrigerant Temperature Sensor - Circuit 1: MMR - Defective sensor

Fault 94
Evaporator Refrigerant Temperature Sensor - Circuit 2: MMR - Defective sensor

Fault 9A
Condenser Entering Water Temperature Sensor: IFW - Defective sensor

Fault 9b
Condenser Leaving Water Temperature Sensor: IFW - Defective sensor

Fault A0
Zone Temperature Sensor: IFW - Defective sensor

Fault A1
Outdoor Air Temperature Sensor: IFW - Defective sensor

Fault Ab
Evaporator Leaving Water Temperature Sensor: MMR - Defective sensor

Fault b5
Low Pressure Cutout - Circuit 1: CMR - Low pressure switch open

Fault b6
Low Pressure Cutout - Circuit 2: CMR - Low pressure switch open

Fault bA
Overload trip - Compressor A: CMR - Current exceeded

Fault bb
Overload Trip - Compressor B: CMR - Current exceeded

Fault bC
Overload trip - Compressor C: CMR - Current exceeded

Fault bd
Overload trip - Compressor D: CMR - Current exceeded

Fault bE
High Pressure Cutout - Compressor C: CMR - High pressure too high

Fault bF
High Pressure Cutout - Compressor D: CMR - High pressure too high

20

Fault C5
Low Chilled Water Temperature (Unit Off): IFW - Antifreeze protection

Fault C6
Low Chilled Water Temperature (Unit On): MAR - Antifreeze protection

Fault CA
Contactor - Compressor A: MMR - Welded compressor contactor

Fault Cb
Contactor - Compressor B: MMR - Welded compressor contactor

Fault CC
Contactor - Compressor C: MMR - Welded compressor contactor

Fault Cd
Contactor - Compressor D: MMR - Welded compressor contactor

Fault d7
Over Voltage: MAR - Voltage 10% > nominal

Fault d8
Under Voltage: MAR - Voltage 10% < nominal

Fault Ed
Chilled Water Flow Interlock: MAR - Flow switch open more than 6 seconds

Fault F5
High Pressure Cutout - Compressor A: MMR - High pressure too high

Fault F6
High Pressure Cutout - Compressor B: MMR - High pressure too high

Fault Fd
Emergency Stop Input: MMR - Emergency stop input open

Fault 180
Starter Transition - Compressor A: CMR 1) Transition proof signal not received

2) Proof input shunted

Fault 181
Starter Transition - Compressor B: CMR 1) Transition proof signal not received

2) Proof input shunted

Fault 182
Starter Transition - Compressor C: CMR 1) Transition proof signal not received

2) Proof input shunted

Fault 183
Starter Transition - Compressor D: CMR 1) Transition proof signal not received

2) Proof input shunted

Fault 184
Phase Reversal - Compressor A: CMR - Phase reversed

Fault 185:
Phase reversal - Compressor B CMR - Phase reversed

Fault 186
Phase reversal - Compressor C: CMR - Phase reversed

Fault 187
Phase reversal - Compressor D: CMR - Phase reversed

Fault 190
Low Superheat - Circuit 1: CMR - Superheat < 1°C during more than

1333°C x seconds

21

F

ault 191

Low Superheat - Circuit 2: CMR - Superheat < 1°C during more than 1333°C x seconds

Fault 194
Low Evaporator Refrigerant Temperature. - Circuit 1: CMR - Refrigerant temperature < setpoint during more than

30°C x seconds

Fault 195
Low Evaporator Refrigerant Temperature. - Circuit 2: CMR - Refrigerant temperature < setpoint during more than

30°C x seconds

Fault 198
Low Oil Flow - Compressor A: CMR - Oil flow switch open during more than 20 seconds

Fault 199
Low Oil Flow - Compressor B: CMR - Oil flow switch open during more than 20 seconds

Fault 19A
low Oil Flow - Compressor C: CMR - Oil flow switch open during more than 20 seconds

Fault 19b
Low Oil Flow - Compressor D: CMR - Oil flow switch open during more than 20 seconds

Fault 19C
Phase Loss - Compressor A: CMR - Loss of 1 or more phases

Fault 19d
Phase Loss - Compressor B: CMR - Loss of 1 or more phases

Fault 19E
Phase Loss - Compressor C: CMR - Loss of 1 or more phases

Fault 19F
Phase Loss - Compressor D: CMR - Loss of 1 or more phases

Fault 1A0
Power Loss - Compressor A: CAR - Loss of all three phases in operation

Fault 1A1
Power Loss - Compressor B: CAR - Loss of all three phases in operation

Fault 1A2
Power Loss - Compressor C: CAR - Loss of all three phases in operation

Fault 1A3
Power Loss - Compressor D: CAR - Loss of all three phases in operation

Fault 1A4
Tracer Communication Loss: IFW - Loss of external information

Fault 1A5
Oil Flow Control - Compressor A: CMR - Problem on oil circuit

Fault 1A6
Oil Flow Control - Compressor B: CMR - Problem on oil circuit

Fault 1A7
Oil Flow Control - Compressor C: CMR - Problem on oil circuit

Fault 1A8
Oil Flow Control - Compressor D: CMR - Problem on oil circuit

Fault 1A9
Electronic expansion valve Electric Drive Circuit

- Refrigerant Circuit 1: CMR 1) Electronic expansion valve wiring

2) Defective UCM

3) Defective Electronic expansion valve

4) Defective Electronic expansion valve relay

22

Fault 1AA
Electronic expansion valve Electric Drive Circuit

- Refrigerant Circuit 2: CMR 1) Electronic expansion valve wiring

2) Defective UCM

3) Defective Electronic expansion valve

4) Defective Electronic expansion valve relay
Fault 1Ad
Memory Error Type I: IFW - Non Volatile Random Access Memory [NOVRAM}

problem, unit is placed on default setting operating
Fault 1AE
Low Differential Pressure - Circuit 1: CMR - Delta P< 2,8bar during more than 2 minutes

Fault 1AF
Low Differential Pressure - Circuit 2: CMR - Delta P< 2,8bar during more than 2 minutes

Fault 1b2
Severe Phase Unbalance - Compressor A: CMR - Phase imbalance >30%, check current transformer

and unit power supply

Fault 1b3
Severe Phase Unbalance - Compressor B: CMR - Phase imbalance >30%, check current transformer

and unit power supply

Fault 1b4
Severe Phase Unbalance - Compressor C: CMR - Phase imbalance >30%, check current transformer

and unit power supply

Fault 1b5
Severe Phase Unbalance - Compressor D: CMR - Phase imbalance >30%, check current transformer

and unit power supply

Fault 1b6
Compressor Overload Setting - Compressor A: IFW - Check setting of compressor overload

Fault 1b7
Compressor Overload Setting - Compressor B: IFW - Check setting of compressor overload

Fault 1b8
Compressor Overload Setting - Compressor C: IFW - Check setting of compressor overload

Fault 1b9
Compressor Overload Setting - Compressor D: IFW - Check setting of compressor overload

Fault 1bA
Phase Unbalance - Compressor A: CMR - Phase imbalance >15%

Fault 1bb
Phase Unbalance - Compressor B: CMR - Phase imbalance >15%

Fault 1bC
Phase Unbalance - Compressor C: CMR - Phase imbalance >15%

Fault 1bd
Phase Unbalance - Compressor D: CMR - Phase imbalance >15%

Fault 1bE
Winding Temperature - Compressor A: CMR - Winding temperature > 105°C

Fault 1bF
Winding Temperature - Compressor B: CMR - Winding temperature > 105°C

Fault 1C0
Winding Temperature - Compressor C: CMR - Winding temperature > 105°C

Fault 1C1
Winding Temperature - Compressor D: CMR - Winding temperature > 105°C

23

Fault 1C6
High Differential Pressure - Circuit 1: CMR - LB/High pressure differential > 24,5 bar

Fault 1C7
High Differential Pressure - Circuit 2: CMR - LB/High pressure differential > 24,5 bar

Fault 1d1
Memory Error Type II: IFW - RAM error

Fault 1d2
Memory Error Type III: IFW - RAM error

Fault 1d3
Compressor Suction Temperature Sensor - Circuit 1:

CMR - Defective sensor

Fault 1d4
Compressor Suction Temperature Sensor - Circuit 2:

CMR - Defective sensor

Fault 1d7
Phase Reversal Protection Lost - Compressor A: CMR - Phase reversal protection not operative

Fault 1d8
Phase Reversal Protection Lost - Compressor B: CMR - Phase reversal protection not operative

Fault 1d9
Phase Reversal Protection Lost - Compressor C: CMR - Phase reversal protection not operative

Fault 1dA
Phase Reversal Protection Lost - Compressor D: CMR - Phase reversal protection not operative

Fault 1db
Slaved Electronic expansion valve
Electronic Drive Circuit - Refrigerant Circuit 1: CMR - Electronic expansion valve electric drive defective

Fault 1dC
Slaved Electronic expansion valve
Electronic Drive Circuit - Refrigerant Circuit 2: CMR - Electronic expansion valve electric drive defective

Fault 1dd
High Oil Temperature - Compressor A: CMR - Oil temperature > 77°C

Fault 1dE
High Oil Temperature - Compressor B: CMR - Oil temperature > 77°C

Fault 1dF
High Oil Temperature - Compressor C: CMR - Oil temperature > 77°C

Fault 1E0
High Oil Temperature - Compressor D: CMR - Oil temperature > 77°C

Fault 1E1
Oil System Fault - Compressor A: CMR - Oil temperature < condenser saturated temperature

during more than 30 minutes

Fault 1E2
Oil System Fault - Compressor B: CMR - Oil temperature < condenser saturated temperature

during more than 30 minutes

Fault 1E3
Oil System Fault - Compressor C: CMR - Oil temperature < condenser saturated temperature

during more than 30 minutes

Fault 1E4
Oil System Fault - Compressor D: CMR - Oil temperature < condenser saturated temperature

during more than 30 minutes

Fault 1E5
Entering Oil Temperature Sensor - Compressor A: CMR - Defective sensor

24

Fault 1E6
Entering Oil Temperature Sensor - Compressor B: CMR - Defective sensor

Fault 1E7
Entering Oil Temperature Sensor - Compressor C: CMR - Defective sensor

Fault 1E8
Entering Oil Temperature Sensor - Compressor D: CMR - Defective sensor

Fault 2A1
Condenser Fan Variable Speed Drive Fault - Circuit 1: IFW - Defective fan speed controller after 5 attempts

Fault 2A2
Condenser Fan Variable Speed Drive Fault - Circuit 2: IFW - Defective fan speed controller after 5 attempts

Note:

MMR: Machine shutdown manual reset.
MAR: Machine shutdown automatic reset.

CMR: Circuit shutdown manual reset.
CAR: Circuit shutdown automatic reset.
IFW: Informational warning.

Communication failures

Fault 410
Loss of Local Display Panel Communication

Fault 412
Chiller Module to Option Module Communication Failure

Fault 413
Chiller Module to Electronic expansion valve Module Communication Failure

Fault 414
Chiller Module to Compressor A Module Communication Failure

Fault 415
Chiller Module to Compressor B Module Communication Failure

Fault 416
Chiller Module Compressor C Module Communication Failure

Fault 417
Chiller Module to Compressor D Module Communication Failure

Fault 418
Chiller Module to Slaved Electronic expansion valve Module Communication Failure

Fault 431
Electronic expansion valve Module to Chiller Module Communication Failure

Fault 434
Electronic expansion valve Module to Compressor A Module Communication Failure

Fault 435
Electronic expansion valve Module to Compressor B Module Communication Failure

Fault 436
Electronic expansion valve Module to Compressor C Module Communication Failure

Fault 437
Electronic expansion valve Module to Compressor D Module Communication Failure

Fault 441
Compressor A Module to Chiller Module Communication Failure

Fault 443
Compressor A Module to Electronic expansion valve Module Communication Failure

25

Fault 445
Compressor A Module to Compressor B Module Communication Failure

Fault 451
Compressor B Module to chiller Module Communication Failure

Fault 453
Compressor B Module to Electronic expansion valve Module Communication Failure

Fault 454
Compressor B Module to Compressor A Module Communication Failure

Fault 461
Compressor C Module to Chiller Module Communication Failure

Fault 463
Compressor C Module to Electronic expansion valve Module Communication Failure

Fault 467
Compressor C Module to Compressor D Module Communication Failure

Fault 471
Compressor D Module to Chiller Module Communication Failure

Fault 473
Compressor D Module to Electronic expansion valve Module Communication Failure

Fault 476
Compressor D Module to Compressor C Module Communication Failure

Fault 481
Slaved Electronic expansion valve Module to Chiller Module Communication Failure

Fault 483
Slaved Electronic expansion valve Module to Electronic expansion valve Module Communication Failure

Fault 484
Slaved Electronic expansion valve Module to Compressor A Module Communication Failure

Fault 485
Slaved Electronic expansion valve Module to Compressor B Module Communication Failure

Fault 486
Slaved Electronic expansion valve Module to Compressor C Module Communication Failure

Fault 487
Slaved Electronic expansion valve Module to Compressor D Module Communication Failure

Unit operating mode

Mode A00
Stopped

Mode A01, A02
Auto

Mode A17
Service Pump down

Mode A70
Waiting, Restart Inhibit

Mode A72
Starting

Mode A74
Running

26

Mode A75
Running, Current Limit

Mode A76
Running, Condenser Limit

Mode A77
Running, Evaporator Limit

Mode A7E
Stopping

Mode A88
Reset

Mode A100
Stopped by Source

Mode A101
Ice Making Complete

Mode A118
Electronic expansion valve Test

Mode A174
Making Ice

Mode A175
Making Ice, Condenser Limit

Mode A177
Making Ice, Evaporator Limit

Mode A200
Low Ambient Temperature Lockout

Mode A234
Manufacturing Test
Stopped By Tracer
Stopped By Remote Display

Compressor operating mode

Mode 00
Stopped

Mode 16
Locked Out

Mode 17
Service Pumpdown

Mode 70
Restart Inhibited

Mode 72
Starting

Mode 74
Running

Mode 75
Run - Current Limit

Mode 76
Run - Condenser Limit

Mode 77
Run - Evaporator Limit

Mode 7E
Stopping

27

MMaaiinntteennaannccee ccoonnttrraacctt

It is strongly recommended that you sign a
maintenance contract with your local Service Agency.
This contract provides regular maintenance of your
intallation by a specialist in our equipment. Regular
maintenance helps ensure that any malfunction is
detected and corrected quickly and minimizes the

TTrraaiinniinngg

The equipment described in this manual is the result of
many years of research and continuous development.
To assist you in obtaining the best use of it, and
maintaining it in perfect operating condition over a
long period of time, the manufacturer has available a
refrigeration and air conditioning service school. The
principal aim of this is to give operators and

possibility that serious damage will occur. Finally,
regular maintenance helps ensure the maximum
operating life of your equipment. Failure to follow
these installation and maintenance instructions may
affect your warranty.

maintenance technicians a better knowledge of the
equipment they are using, or that is under their charge.
Emphasis is particularly given to the importance of
periodic checks on the unit operating parameters as
well as on preventive maintenance, which can reduce
the cost of owning the unit by helping avoid serious
and costly breakdown.

The Trane Company
An American Standard Company
www.trane.com

For more information contact
Your local sales office or
e-mail us at [e-mail]

This publication is a general guide to install, use and properly maintain our products. The information
given may be different from the specification for a particular country or for a specific order. In this
event, please refer to your nearest office.

All rights reserved. No part of this publication may be reproduced or transmitted in any form or by
any means without the written authorization of the manufacturer.

Literature Order Number L80 IM 025 E

Date July 2000

Supersedes L80 IM 025 E - 1297

Stocking Location La Crosse

Since The Trane Company has a policy of continuous product improvement, it reserves the right to
change design and specifications without notice.

Société Trane – Société Anonyme au capital de 41500 000 F – Siege Social: 1 rue des Amériques – 88190

Golbey – France – Siret 306 050 188-00011 – RSC Epinal B 306 050 188
Numéro d’identification taxe intracommunanutaire: FR 83 3060501888