Carrier Sanyo 16TJ Troubleshooting guide

16TJ
Single-Effect Steam-Fired
Absorption Chillers
Nominal cooling capacity 352-2461 kW
50 Hz
Operation and maintenance instructions
GB/T-19001-2000 to ISO9001/2000

2
NOTES TO USERS
Thank you for purchasing a Carrier/Sanyo absorption chiller.
Read this manual carefully before operating the unit. It contains instructions for the operation and maintenance of the chiller.
Please utilize the chiller to its optimum performance by carrying out the recommended daily maintenance and handling
instructions as well as the periodic service.
If you need any information about maintenance contracts or have any other enquiries, please contact your Carrier service agent.

3
The cover photograph is for illustrative purposes only, and are not contractually binding.
CONTENTS
1 - PRECAUTIONS .......................................................................................................................................................................... 4
1.1 - Safety precautions ....................................................................................................................................................................... 4
1.2 - High-temperature - high-voltage caution ...................................................................................................................................8
1.3 - Environmental requirements ....................................................................................................................................................... 8
1.4 - Water treatment ........................................................................................................................................................................... 8
2 - MACHINE ILLUSTRATIONS .................................................................................................................................................. 8
2.1 - Typical chiller detail ................................................................................................................................................................... 8
2.2 - Control panel .............................................................................................................................................................................. 9
2.3 - Chiller flowchart and component function description ............................................................................................................11
3 - OPERATING INSTRUCTIONS .............................................................................................................................................. 12
3.1 - Self-diagnostic function ............................................................................................................................................................ 12
3.2 - Description of keys and their functions .................................................................................................................................... 13
3.3 - Control board settings ............................................................................................................................................................... 14
3.4 - Operation ..................................................................................................................................................................................16
3.5 - Changing the information on the data display .......................................................................................................................... 17
3.6 - Changing display and setpoint .................................................................................................................................................. 18
3.7 - Maintenance message ............................................................................................................................................................... 18
3.8 - Alarm messages and actions required ....................................................................................................................................... 18
4 - MAINTENANCE ....................................................................................................................................................................... 20
4.1 - Daily maintenance .................................................................................................................................................................... 20
4.2 - Periodic maintenance ................................................................................................................................................................ 23
4.3 - Recommended maintenance and main component replacement schedule ............................................................................... 24
4.4 - Water treatment ......................................................................................................................................................................... 25
5 - TROUBLESHOOTING ............................................................................................................................................................ 27
6 - INSTRUCTIONS ....................................................................................................................................................................... 29
6.1 - Absorbent sampling method ..................................................................................................................................................... 29
6.2 - Concentration measurement method ........................................................................................................................................29
7 - MAINTENANCE CONTRACT ............................................................................................................................................... 31
7.1 - Annual maintenance contract .................................................................................................................................................... 31
7.2 - Inspection report ....................................................................................................................................................................... 31
7.3 - Warranty .................................................................................................................................................................................... 31
Appendix 1 - Troubleshooting flowchart ....................................................................................................................................32-41

4
1 - PRECAUTIONS
1.1 - Safety precautions
• Before operating this chiller, first carefully read the
following instructions.
• All precautions are classified as either WARNING or
CAUTION.
WARNING: Failure to observe this instruction may result in
serious injury or death.
CAUTION : Failure to observe this instruction may cause an
injury or failure of chiller. Depending on circumstances, this
may result in serious injury or death.
This symbol denotes danger, a warning or a caution.
The illustration in this symbol shows the specific
description of the item.
This symbol prohibits an action.
The illustration next to this symbol shows the specific
description of the item.
This symbol instructs an action to be done.
The illustration in this symbol shows the specific
description of the item.
• After reading this manual, it should be kept in a safe place
to be available for any user at any time.
TURN OFF THE BREAKER BEFORE CLEANING AND
CHECKING
Always turn off the circuit breaker before cleaning and checking
the cooling tower fan, chilled water pump, or other components
linked to the chiller, to provide protection from electric shock or
possible injury from the rotating fan.
DO NOT TOUCH THE CONTROL PANEL SWITCH WITH
WET HANDS
Do not touch the switch inside the control panel with wet hands
to avoid electric shock.
STOP OPERATION IN CASE OF FIRE, EARTHQUAKE OR
ELECTRICAL STORMS
Stop operation in case of fire, earthquake or an electrical storm, to
prevent fire or electric shock.
DO NOT TOUCH THE WIRING INSIDE THE CONTROL
PANEL
Do not touch the wiring inside the control panel to avoid electric
shock.
SWITCH
DO NOT TOUCH
DO NOT TOUCH
DO NOT TOUCH HIGH-VOLTAGE CABLES
Do not touch high-voltage cables to avoid electric shock.
DO NOT TOUCH
MUST BE OBSERVED
1.1.1 Safety considerations
WARNINGS
INSPECTION

5
DO NOT OPERATE THE CHILLER IF THERE IS A SMELL
OF GAS
Do not operate the chiller if there is a smell of gas. Do not turn
on/off any switch, as this could cause a fire.
DO NOT TOUCH ROTATING PARTS OF FANS
Keep away from rotating part of fans or pumps to avoid
possible injury.
PROHIBITED
PROHIBITED
PROHIBITED
SOLVE ALL PROBLEMS BEFORE RESTARTING THE
CHILLER
Solve all problems before restarting the chiller after a safety or
security device is activated, to prevent fire.
MUST BE OBSERVED
DO NOT PLACE HEAVY OBJECTS ON THE CHILLER
OR CONTROL PANEL
Do not place heavy objects on the chiller or control panel as
these may fall off and cause injuries.
PROHIBITED
DO NOT CLIMB ON THE CHILLER
Do not climb on the chiller as you may fall off.
PROHIBITED
CALL SPECIALISTS FOR SERVICE OR MAINTENANCE
Call specialists for service or maintenance. Incorrect service/
maintenance may cause electric shocks, fire or burns.
MUST BE OBSERVED
AUTHORIZED PERSONNEL ONLY
A notice, "For Authorized Personnel Only" must be affixed to
the chiller to stop unauthorized personnel from touching it. If
necessary surround the chiller by a protective fence. Misuse of
the chiller may cause injury.
PROHIBITED
WARNINGS CAUTIONS
1 - PRECAUTIONS - CONT.
KEEP FLAMMABLE SUBSTANCES AWAY FROM THE
CHILLER
Do not place any flammable substances (e.g. gasoline, thinner)
close to chiller, flue, chimney and oil tank to prevent fire.

6
DO NOT POUR WATER ON THE CHILLER OR CONTROL
PANEL
Do not pour water on the chiller or control panel to avoid electric
shock.
PROHIBITED
USE THE CORRECT POWER SUPPLY
This is indicated on the chiller name plate. Use of an incorrect
power supply may cause fire or electric shock.
PROHIBITED
NEVER CHANGE THE SET VALUES
Never change the set values of the safety and/or protective
devices. Wrong settings may damage the chiller or cause fire.
PROHIBITED
STOP THE OPERATION WHEN COMBUSTION SMOKE IS
BLACK
Stop the operation when combustion smoke is black and call a
service engineer..
MUST BE OBSERVED
DO NOT TOUCH THE ABSORBENT
Do not touch the spare or leaked absorbent, as this can cause
metal corrosion or skin disease.
PROHIBITED
OBSERVE THE SPECIFIED WATER AND STEAM PRESSURE
The specified chilled water, steam and cooling water pressure
must be strictly observed.
Incorrect pressure may cause the water to leak/spray which can
lead to short circuits or burns.
MUST BE OBSERVED
PROHIBITED
STOP THE PURGE PUMP TO REPLACE OIL
Stop the purge pump when replacing oil to avoid possible injury
by fuel spillage.
MUST BE OBSERVED
DO NOT TOUCH HIGH-TEMPERATURE AREAS
Do not touch high-temperature areas, as they may cause burns.
These areas are indicated by caution label.
What
voltage?
STOP
CAUTIONS
1 - PRECAUTIONS - CONT.

7
ONLY AUTHORIZED PERSONNEL SHOULD SERVICE
THE CHILLER
Only authorized personnel should service the chiller. Incorrect
service could result in electric shock or fire.
PROHIBITED
1.1.2 - Safety precautions for repair, moving or disposal
ONLY AUTHORIZED PERSONNEL SHOULD REMOVE OR
REPAIR THE CHILLER
Any relocation or moving of the chiller should only be done by
authorized personnel. Incorrect work could result in water leaks,
electric shock or fire.
MUST BE OBSERVED
ONLY AUTHORIZED PERSONNEL SHOULD DISPOSE OF
THE CHILLER
To dispose of the chiller, contact local specialists. Incorrect
disposal may result in absorbent leaks and cause metal corrosion
or skin disease, electric shock or fire.
MUST BE OBSERVED
WARNINGS
CAUTION
1.1.3 - Operating precautions
1. Keep the purge valve tightly shut to prevent air from
leaking into the chiller, which may cause the failure of the
chiller.
2. Keep the power supply to the control panel turned on,
unless carrying out maintenance or service.
3. During the chiller dilution cycle the chilled-water pump
(both the primary side and the secondary side) and air
handling unit must be operated for the required time. The
chiller has some cooling capacity, even in the dilution
cycle. Do not stop the air handling unit before the required
time to prevent possible subcooling.
4. Do not perform an insulation test on the control circuits of
the electric controller.
5 . Use a Carrier recommended interlock system to stop/
start the auxiliary equipment. The interlock system
automatically stops/starts the chilled-water pump and
cooling water pump. Please follow the start procedure in
Figure 1 below.
Fig. 1 - Auxiliary equipment start/stop sequence
1: Chilled
water pump
2: Cooling
water pump
3: Cooling
tower
5: Air
handling
unit
1 Absorption
chiller
2: Cooling
water pump
3: Cooling
tower
4: Chilled
water pump
5: Air handling
unit
1 - PRECAUTIONS - CONT.
4: Absorption
chiller

8
2 - MACHINE ILLUSTRATIONS
2.1 - Typical chiller detail
Fig. 2 - Water header side
1
2
3
4
5
6
7
8
9
10
11
12
Fig. 3 - Control panel side
2
3
Legend
1 Condenser
2 Cooling water outlet
3 Chilled water flow switch
4 Chilled water outlet
5 Evaporator
6 Chilled water inlet
7 Cooling water inlet
8 Purge pump
9 Steam inlet
10 Generator pressure switch
11 Generator
12 Absorber
1
Legend
1 Drain outlet
2 Hot water outlet
3 Control panel
1 - PRECAUTIONS - CONT.
1.2 - High-temperature - high-voltage caution
• Do not touch the chiller during operation since its surface
becomes hot.
• Do not touch the absorbent pump, the refrigerant pump,
and the purge pump during operation, since their surface
becomes hot.
• Do not touch the junction box during operation, since it
contains high-voltage wiring.
• Do not touch the terminal box during operation, since it
contains high-voltage wiring.
1.3 - Environmental requirements
1.3.1 - Installation considerations
The 16TJ absorption chiller is designed for indoor installation
in a machine room. The protection rating of the chiller is IP40.
Room temperature should be maintained between 5°C and
40°C to protect against solution crystallization during chiller
shutdown. The humidity in the machine room must be kept
below 90%.
1.3.2 - Field wiring
The machines should be connected to a power source that
complies with overvoltage category III (IEC 60664). All other
wiring should comply with overvoltage category II.
1.3.3 - Altitude
Please install the absorption chiller at a maximum height of
1000 m above sea level. If the location is higher than 1000 m
above sea level, please contact your local Carrier office.
1.4 - Water treatment
Refer to chapter 4 "Maintenance”.

9
2.2 - Typical control panel
Fig. 4 - Control panel (CE type)
1
6
2
7
3
8
9
4
5
Legend
1 Fan
2 Terminal block
3 Terminal block
4 Terminal block for power supply
5 Earth terminal
6 Control board
7 Purge indication light
8 Purge pump on/off switch
9 Operating handle
Fig. 5 - Control panel inside (CE type)
1
9
2
3
10
4
5
6
7
8
Legend
1 Control relay
2 Circuit protector
3 I/O board
4 Circuit breaker
5 Main circuit breaker
6 Transformer
7 Electromagnetic contactor
8 Filter
9 Transformer
10 Terminal block

10
STOP RUN
CHILLER
REF PUMP
PURGE PUMP
ABS PUMP
STAND BY
DILUTION
SAFETY CIRCUIT
CHILLER ALARM
POWER
STOP RUN
OPERATION
BUZZER STOP LOCAL
REMOTE
SET BACK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Fig. 6 - Control board
Legend
1 Stop indication light
2 Operation indication light
3 Data display
4 Select key
5 Function set key
6 Back select key
7 Remote/local select key with LED
8 Alarm buzzer stop key
9 Operation select key with LED
10 Alarm indication light
11 Stand-by indication light
12 Dilution indication light
13 Safety circuit indication light
14 Power indication light

11
2.3 - Chiller flowchart and component function
description
Evaporator
The refrigerant is dispersed on the heat transfer tubes of the
evaporator. Chilled water running through the heat transfer
tubes of evaporator is cooled by the latent heat of vaporized
refrigerant.
Absorber
The concentrated solution is dispersed on the heat transfer
tubes of absorber. The refrigerant vapour from the evaporator
is absorbed on the heat transfer tubes of the absorber by the
concentrated solution. Cooling water running through the heat
transfer tubes of the absorber is heated by the absorption heat.
Heat exchanger
After leaving the absorber section the diluted solution passes
through the heat exchanger, where it is heated by the concen-
trated solution. The concentrated solution is cooled by the
diluted solution. Due to the lower temperature this cooling
process of the concentrated solution allows for greater
absorbing power.
Generator
The steam passes through the heat transfer tubes of the
generator. The diluted solution in the generator is heated by the
steam. It releases the refrigerant vapour and is concentrated to
become a concentrated solution.
Fig. 7 - Flow diagram
V2
V3
SV2
SV1
V1
DT10
DT6
69CHDT1
DT5
DT2
PCH69PR
DT12
DT13
D7
DT7
SV6
D1
SV4
SV7
63GH
DT3
SV3
DT11
23CH
D1: Diluted solution main damper 1: Purge pump 12: Z-valve (rupture disk isolation valve)
D7: Steam drain damper 2: B-valve (manual purge valve) 13: Condenser
SV1: Charge/removal service valve N2 gas 3: Chilled-water outlet 14: Generator
SV2: Purge unit service valve 4: Chilled-water inlet 15: Evaporator
SV3: Refrigerant service valve 5: Purge unit 16: Absorber
SV4: Diluted solution service valve 6: Cooling water outlet 17: Cooling water inlet
SV6: Concentrated solution service valve 7: Purge tank 18: Heat exchanger
SV7: Generator pressure gauge service valve 8: Refrigerant pump 19: Steam control valve
V1: Manual purge valve 9: Refrigerant blow-down valve 20: Steam inlet
V2: Manual purge valve 10: Absorption pump 21: Steam drain reclaimer
V3: Manual purge valve 11: Rupture disk 22: Steam drain outlet
Sensor
Service valve
Damper
Check valve
Valve
Legend
1
58
4
3
2
6
7
9
10
12
11
14
13
15
16
17
18
22
20
19
21
Condenser
The refrigerant vapour from the generator is condensed on the
heat transfer tubes of the condenser. Cooling water from the
absorber is heated by condensation heat.
Purge unit
The purge unit collects the non-condensable gas in the chiller
and stores it in the purge tank.
Sensors
SYMBOL NAME
DT1 Chilled-water leaving temperature
DT2 Cooling water leaving temperature
DT3 Generator temperature
DT5 Condenser temperature
DT6 Chilled-water entering temperature
DT7 Cooling water entering temperature
DT8 Not used
DT9 Not used
DT10 Diluted solution temperature at absorber outlet
DT11 Evaporator refrigerant temperature
DT12 Cooling water mid-temperature
DT13 Steam drain temperature
23CH Temperature controller
69CH Chilled water flow switch
PCH Palladium cell heater
69PR Purge tank pressure

12
3 - OPERATING INSTRUCTIONS
3.1 - Self-diagnostic function
The self-diagnostic function starts when the breaker inside the
control panel of the chiller is turned on. After self-diagnosis
is completed, the data display on the control board shows the
following information.
• Data display (7-segment LED) and all LEDs light up.
• If there is no abnormality the data display shows the
version number. If there is a power failure, H-10 is
displayed after the power is restored.
NOTE: The version number differs with each chiller type.
• The data display shows the generator temperature.
(120.4)
If the self-diagnosis function detects an error, this will be
shown on the data display. For the alarm indication, please
refer to chapter 3.8.
Fig. 8 - Control panel

13
STOP RUN
CHILLER
REF PUMP
PURGE PUMP
ABS PUMP
STAND BY
DILUTION
SAFETY CIRCUIT
CHILLER ALARM
POWER
STOP RUN
OPERATION
BUZZER STOP LOCAL
REMOTE
SET BACK
1
2
4
6
7
8
9
10
12
5
11
3
Fig. 9 - Typical control board
Legend
1 Operation indication light: The operation indication light is on when the chiller is running.
2 Stop indication light: The stop indication light is on when the chiller is shut down.
3 Alarm indication light: The alarm indication light is on when an alarm occurs.
4 Remote/local select key with LED: To select remote operation or local operation.
5 Operation select key with LED: Key used to run/stop the chiller.
The stop key is also used for alarm rset.
6 Data display (7-segment LED): Shows the temperature, setpoint, etc.
7 Standby indication light: On when the chiller is waiting for the interlock signals form the chilled water and the cooling water pump.
8 Dilution indication light: On during the dilution cycle.
9 Safety circuit indication light: On when power is supplied to the control circuit.
10 Power indication light: On when power is supplied to the control circuit.
11 Data select key: To change the menu and set a new value.
12 Alarm buzzer stop key: To stop the alarm buzzer.
3.2 - Description of keys and their functions

14
3.3 - Control board settings
3.3.1 -Time setting
Refer to Figures 10 and 11.
! ! ! !
! ! ! !
! ! ! !
! ! ! !
Fig. 10 - Display example
High-temperature generator temperature
Press the " SET " key for about 2 seconds.
Press key.
Press the " SET " key for about 2 seconds.
Press the " SET " key for about 2 seconds.
Press or key.
Press the " SET " key for about 2 seconds.
Press key.
Press the SET key for about 2 seconds.
Press key to set the month.
Press key.
! ! ! !
! ! ! !
! ! ! !
! ! ! !
! ! ! !
! ! ! !
Fig. 10 - Display example (cont.)
Press key to set the day.
Press the SET key for about 2 seconds.
Press key.
Press the SET key for about 2 seconds.
Press key to set the hour.
Press key.
Press key to set the minutes.
Press the SET key for about 2 seconds.
Press the BACK key.
Press the BACK key.
High-temperature generator temperature
3.3.2 - Battery backup
Refer to Figure 12.
SW3
Connect a backup battery which is used to maintain the time
setting when a power failure occurs. Turn it ON after installing
the equipment. CR-2025 is used as the backup battery and has
an accumulative operating period of about six months.
NOTES:
1. SW3 (battery backup) is set to OFF at the factory to
avoid using battery power.
2. If SW3 (battery backup) is set to OFF when a power
failure occurs, F-21 (CPU alarm) or F-23 (Time set
alarm) is displayed. Please reset the time setting.
3. If SW3 (battery backup) is set to ON and F-21 or F-23 is
displayed, it is necessary to replace the battery.

15
Fig. 11- SW3 backup switch and backup battery
Backup battery
SW3: Backup switch UP: ON DOWN: OFF
LABEL

16
Fig. 13 - Display example
High-temperature generator temperature
Press the SET key for about 2 seconds.
Press the or key.
Press the SET key for about 2 seconds.
Press the or key.
Press the or key.
Press the SET key for about 2 seconds.
Then press the or key.
To change pulse mode
By pressing the SET key, the pulse
mode is selected.
Press the SET key for about 2 seconds.
Then press the or key.
To change the negative mode
Press SET" key to select negative mode.
To change the static mode
By pressing the SET key, the
static mode is selected.
To change the positive mode
Press SET key to select positive mode.
STOP RUN
CHILLER
REF PUMP
PURGE PUMP
ABS PUMP
STAND BY
DILUTION
SAFETY CIRCUIT
CHILLER ALARM
POWER
STOP RUN
OPERATION
BUZZER STOP LOCAL
REMOTE
SET BACK
Fig. 14 - Control board
1
2
3 4
Legend
1 Remote key
2 Local key
3 Stop key
4 Run key
Control board setting
Remote
signal type
(1) free
(2)
(3)
(4) free
(5)
NOTE: If the chilled-water pump, cooling water pump, and
chiller are interlocked, each pump runs automatically when
starting the chiller. If not, the start sequence must be:
Chilled-water pump, cooling water pump, chiller.
3.4.2 - Start cooling operation
Refer to Figure 14.
Local operation mode
• Press the "LOCAL" key on the chiller control board. The
"LOCAL" indication light of the key is on.
• Keep pressing the "RUN" key for more than a second and
make sure that the "RUN" indicator lightp of the key is on.
• Automatic operation starts.
Remote operation mode
• Press the "REMOTE" key on the chiller control board.
The "REMOTE" indicaton light of the key is on.
• Turn on the start switch on the remote control panel for
the field supply. The indicator light of the "RUN" key on
the chiller control board is on.
• Automatic operation starts.
3.4 - Cooling operation
3.4.1 - Pre-operation checks
Please check the following items before starting operation:
• Check the setpoint of the chilled-water leaving
temperature. Make sure that the chilled-water leaving
temperature is set as specified. For the indication of the set
value, please refer to chapter 3.8.
• Check the steam and steam drain equipment
- Make a daily inspection (refer to chapter 4).
- Check that the steam valve(s) is (are) open.
3.3.4 - Changing remote signal setting (continuous, pulse etc.)
After wi ring of the remote signal, the control board shown
below should be set. Refer to field wiring diagram.
3.3.3 - How to change the temperature unit
The temperature unit can be changed as follows, even while the
chiller is operating.
Fig. 12 - Display example
Press the " SET " key
for about 2 seconds.
Press or key.
Press the SET key
for about 2 seconds.
Press or key if you need.
Press the SET key
for about 2 seconds.
And push or key.
To change °C To change °F
Press the "SET" key to select °C mode and again to select the °F mode
High-temperature
generator
temperature

17
It returns to the generator temperature display when no key is
pressed for 1 minute.
3.5.2 - Changing the display
Refer to Figure 15.
If you press the key, the information on data display changes
in the correct order, and pressing the key, it changes in
reverse order.
If you press the key again when the last information is
shown, the display returns to the normal display information.
3.5.3 - Typical display order
Real-time data is shown in the data display (7-segment
LED and 6 figures). The display shows a data code (content
distinction by code number) and various operating times, on/off
time, component temperatures, chilled/hot-water temperature
setpoints and alarm codes. A data code is sent in turn from
the keys and displayed. An alarm code is only shown
when one or several abnormalities occur. The alarm code is
shown in order of importance, and a dotted "." is shown under
the number to the right of the alarm code. When several faults
occur, use the keys to display the additional alarm codes.
If no key including the "BACK" key is pressed for 1 minute,
the display returns to the generator temperature display.
Fig. 16 - Typical display order
Data code Data name Display Means
- Generator temperature 135.0°C
1. Chiller operating hours 1234 hours
2. Absorbent pump operating hours 1111 hours
3. #2 absorbent pump operating hours Not used
4. Combustion hours Not used
5. Refrigerant pump operating hours 1201 hours
6. Purge pump operating hours 107 hours
7. Chiller on/off times 123 times
8. Absorbent pump on/off times 169 times
9. #2 absorbent pump on/off times Not used
A. Combustion on/off times Not used
B. Refrigerant pump on/off times 138 times
C. Purge pump on/off times 51 times
10. Chilled-water temperature setpoint 7.0°C
11. Hot-water temperature setpoint 55.0°C
12. Chilled-water entering temperature 11.9°C
13. Chilled-water leaving temperature 6.8°C
14. Cooling water entering temperature 31.8°C
15. Condenser temperature 34.7°C
16. Steam drain/exhaust gas temperature 211.7°C
17. Purge tank pressure 8.5 kPa
- Generator temperature 135.0°C
STOP RUN
CHILLER
REF PUMP
PURGE PUMP
ABS PUMP
STAND BY
DILUTION
SAFETY CIRCUIT
CHILLER ALARM
POWER
STOP RUN
OPERATION
BUZZER STOP LOCAL
REMOTE
SET BACK
Fig. 15 - Control board
Legend
1 Data display
2 Select key: changes the data display information
3 Back select key
2
3
1
NOTE: In local operation mode the signal from the remote
control panel does not work. In remote operation mode the
"RUN" key of the chiller control board does not work.
3.4.3 - Stop operation
Refer to Figure 14.
Local operation mode
• Keep pressing the "STOP" key on the chiller control board
for more than a second.
• Make sure that the "RUN" indication light goes off and the
"STOP" indication light comes on.
Remote operation mode
• Turn on the stop switch on the field supply remote control
panel.
• Another way to stop the chiller is to press the "STOP" key
on the chiller control board during remote operation.
NOTE: If the chilled-water pump, cooling water pump, and
chiller are interlocked, each pump stops automatically when
the chiller stops. If not, the stop sequence must be:
Chiller, cooling water pump, chilled-water pump
The air handling unit must be stopped after the chilled-water
pump is stopped
3.5 - Changing the information on the data display
3.5.1 - Normal display information
Data display on the control board usually shows high
temperature generator temperature as follows.

18
Fig. 18 - Maintenance message
Data code Data name Display Means
H-01* Operate purge pump Operate purge pump.
H-03* Clean cooling water tubes Fouling of cooling water tubes.
H-04* Check cooling water system Check cooling water pump,
cooling tower, etc.
H-06** Purge tank high pressure Purge tank pressure is high.
H-07** Cooling water tubes foul Fouling of cooling water tubes.
H-08** Cooling water high temperature Cooling water temperature is high.
H-10 Power failure There was a power failure while
the chiller was operating
Legend
* When this appears, immediate action is required.
** When this appears, no immediate action is required, but as this might lead to
a higher code, attention should be paid. Consult Carrier service personnel at
the next periodic maintenance.
NOTE: These displays disappear when the problem has been
corrected.
Fig. 19 - Maintenance message descriptions and
actions required
Maintenance message Display Action
1 Cooling water tubes Cooling water tubes must be cleaned.
foul Contact Carrier service agent to do the job
2 Vacuum rate The purge tank must be purged immediately.
If this message is shown frequently, contact
your Carrier service agent.
3 Cooling water
high temperature Check the cooling water pump, cooling tower, etc.
4 Power failure See section 3.8.5.
3.8 - Alarm messages and actions required
3.8.1 - How they are shown
When an alarm is detected, the alarm buzzer sounds (option),
and the alarm message is shown on the data display. At the
same time, the indication light of the "STOP" key blinks.
The chiller stops for safety reasons after the dilution cycle.
Depending on the alarm message it may also stop without
carrying out the dilution cycle.
Fig. 20 - Display example
Chilled-water low temperature
An alarm code is only shown when one or several
abnormalities occur. If several errors have occurred, the most
important one is shown with a dot ".".
Chilled-water low temperature
The other alarm codes are shown by
pressing the key (option).
The high-temperature generator
solution level is too low.
Maintenance Message
Display Action
1 Fouling of cooling
water tubes Cooling water tubes must be cleaned.
Contact Carrier/SANYO service agent to do the job.
2 Vacuum rate
The purge tank must be purged immediately.
In case this indication is shown frequently,
contact Carrier/SANYO service agent.
3High temperature
of cooling water Check the cooling water pump, cooling tower, etc.
4 Power failure See section 3-8-5.
3.6 - Changing display and setpoint
Setpoint display change
Chapter 3.5.2 "Changing the display" describes how the current
chilled-water temperature setpoint or hot-water temperature
setpoint can be changed.
Select the current setpoint temperature and change it as
follows.
To change the chilled-water temperature:
7.0°C
Press the SET key
for about 2 seconds.
A number showing the setpoint
temperature blinks.
Press the or key.
7.5°C
Press the SET key
The setpoint change has been made.
If no key including the "BACK" key is pressed for 1 minute,
the display returns to the generator temperature.
NOTES:
1. Incorrect setting may cause chiller failure. If you need to
change the setpoint, always consult your Carrier service
agent. If the chilled-water leaving temperature is set
below the rated value, the maximum input rate (gas or
oil) needs to be decreased.
2. Setpoints become effective as soon as they have been
changed. Be careful when changing setpoints during
operation.
3.7 - Maintenance message
If a problem that could affect the efficient operation of the
chiller is predicted, a warning message is given. This includes a
comment on the data display as shown in Figure 18.

19
3.8.4 - Locating and clearing alarm
Fig. 22 - List of alarm messages and
their causes and remedies
Display and content of alarm
Alarm of the chilled water and/or cooling water system
Check that the discharge pressure of both chillled-
Chilled water temperature is too low. water and cooling water pumps is normal.
Chilled water flow alarm
→ If not, the strainer may be clogged, or there may
be an air leak in the piping, etc.
Is the chilled-water setpoint too low?
Cooling water temperature is too low → Correct it to the specified setpoint.
Cooling water flow alarm (option) Is the cooling water setpoint too low?
→ Correct it to specified setpoint (e.g. 28°C).
Correct the above causes and restart the chiller.
If the "CHILLER ALARM" continues, check the
following and contact your Carrier service agent:
• Entering and leaving chilled/hot water temperature
• Entering and leaving cooling water temperature
• Generator temperature and pressure
Alarm of the motor(s)
First check that the reset button(s) of the
Absorbent pump overload alarm. overload relay connected to the electromagnetic
contactor is not pushed in, and then contact your
Carrier service agent.
Refrigerant pump overload alarm
Reset buttons
Alarm of the auxiliary equipment
Chilled water pump interlock alarm. Check that the chilled/hot water pump and cooling
water pump are rotating.
→ Start the pumps
Cooling water pump interlock alarm. Check the fan and/or other equipment connected
to the system interlock.
Correct the above causes and restart the chiller.
If the "CHILLER ALARM" continues, contact your
Carrier service agent.
Cooling tower fan overload alarm.
Generator alarm
Check that the cooling water pump is rotating.
Generator temperature is too high. → Start the pump.
Check that the cooling water line valve is open.
→ Open the valve.
Generator pressure is too high. Check that the cooling water pump discharge
pressure of is normal.
→ If not, the strainer may be clogged, or there may
be an air leak in the piping, etc.
High concentration of absorbent Correct the above causes and restart the chiller
If the "CHILLER ALARM" continues, check the
following and contact your Carrier service agent:
• Entering and leaving chilled-water temperature
• Entering and leaving cooling water temperature
• Generator temperature and pressure.
• Is the chilled water setpoint too low?
→ Correct it to the specified setpoint.
• Water in the heat transfer tubes may be fouled
(especially cooling water).
3.8.2 - Troubleshooting flowchart
Symptoms Action
An alarm occurs.
Alarm buzzer sounds (option), and the
indication light of the "STOP" key blinks.
The alarm message is shown in the data
display.
Press the "BUZZER STOP" key on the
control board.
The alarm buzzer stops (option).
Check alarm message and solve the problem.
Press the "STOP" key on the control board
after the troubleshooting is completed.
The indication light of the "STOP" key
stops blinking and remains lit. The alarm
code on the data display disappears.
NOTES:
1. The data display still shows an alarm, when
the "STOP" key is pressed. Check the
alarm message, before cancelling the alarm.
2. If a combustion alarm occurs, operation
does not restart without pressing the reset
button on the burner controller.
Start operation
Operation restarts.
3.8.3 - Alarm message and setpoint
Fig. 21 - List of alarms and setpoints
in cooling operation
Purpose Display Alarm message Setpoint
Protection of Chilled water temperature is too low. 2.5°C or below
chilled water Chilled water pump interlock alarm. -
system Chilled water flow alarm 50% or below
Cooling water temperature is too low. 24°C or below
after 30 minutes
Prevention of Cooling water pump interlock alarm. -
Crystallisation Cooling water flow alarm 50% or below
Generator temperature is too high. 105°C
Protection of Generator pressure is too high. 101.3 kPa or above
high
temperature High concentration of absorbent 65% or above
generator twice
65.5% or above
Protection of Absorbent pump overload alarm. Rated current
motor Refrigerant pump overload alarm. value or above
Purge pump overload alarm. "
Others Fan interlock etc. alarm. "
Efficiency is too low. -
Cooling tower fan overload alarm.

20
Sensor alarm
Is the sensorshort-circuited?
Entering chilled-water temperature → Check all chiller sensors and contact your
sensor alarm. Carrier service agent.
Entering cooling water temperature
sensor alarm.
Leaving cooling water temperature
sensor alarm.
Cooling water intermediate
temperature sensor alarm.
Condenser temperature sensor alarm.
Refrigerant temperature sensor alarm
(evaporator).
Diluted solution temperature sensor
alarm (absorber outlet).
Leaving chilled-water temperature
sensor alarm.
High-temperature generator
temperature sensor alarm.
Purge tank pressure sensor alarm.
3.8.5 - Action in case of a power failure
Flowchart of actions in case of a power failure
Power failure
occurs.
The chiller stops
completely.
Power failure
Power alarm H-10
returns. is shown on the
data display.
Press the "RUN"
key.
Power failure
Operation alarm on the
restarts. data display
disappears.
Actions to be taken if a power failure occurs
If a power failure occurs, the chiller stops completely without
carrying out a dilution cycle. Special attention should be paid
to the following.
Actions required when a power failure occurs
Operation condition at power failure Action
Occurred during cooling operation, and Immediately contact your Carrier service agent.
power did not return for over an hour Do not restart operation.
Occurred during cooling operation, and Contact Carrier service agent after restarting
power returned in less than an hour operation.
Occurred during purging operation Immediately close the purge valve completely and
turn the purge pump switch on the control panel
off. After the power is restored, restart purging,
and consult your Carrier service agent.
4 - MAINTENANCE
4.1 - Daily maintenance
4.1.1 - Inspection of each chiller component
If you find an abnormal condition, contact your Carrier service
agent:
• Smell of gas or oil leak around the chiller
• Abnormal noise at the start of the burner
• Abnormal noise of absorbent pump and refrigerant pump
For the following items please consult the system manufacturer:
• Cleaning of cooling tower and cooling water line strainer
• Check the condition of the cooling tower
• Check for air leaks in the piping
4.1.2 - Operation data record
Please record the operation data regularly, as this is useful for
troubleshooting and alarm prevention. Show the record to the
Carrier service personnel when they visit you for the service or
the periodic inspection.
On the next page you will find a sample of the operation data
sheet.
NOTE: The chiller automatically
stops for safety reasons when
either the generator temperature
or the chilled-water temperature
sensor has an alarm. It does not
stop when other sensors have
an alarm, but this could cause
control failure. Please contact
your Carrier service agent as
soon as possible.