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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.
3 High 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.