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SI0364

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File In/With: SI0364

New 1117
Equipment YK Style G and earlier chillers
Affected:
Service
Information V.00A 03630 OptiView Chiller Control Panel
Software Update

GENERAL
Beginning April 2016, enhanced software will be supplied in new production YK chillers and replacement mi-
croboard kit 331-02430-601. Software version 00A is applicable to the 031-03630-001 microboard for YK Style G
and earlier YK chillers. The enhancements are listed below.
The microboard, software version and program card part number are:
031-03630-001 = Y.OPT.01.00A.308 (P/N 031-03601-001)

MAXIMUM MVVSD OUTPUT FREQUENCY DETECTION


Hot gas bypass control was found to be working incorrectly on a customer brine chiller. This unit had a MVVSD
where the VSD was indicating several tenths of a Hz below maximum frequency when being commanded to max
frequency while the chiller was surging. The hot gas bypass was not opening because the VSD was not indicating
full speed, as required by the control logic. This was due to the VSD reporting the motor frequency rather than
replying with the inverter frequency. The logic in OptiView has been changed to lower the threshold that indicates
maximum VSD speed.
For 60 Hz VSD:
• VSD Frequency Command >= 59.9 Hz
• VSD Output Frequency >= 58.8 Hz
For 50 Hz VSD:
• VSD Frequency Command >= 49.9 Hz
• VSD Output Frequency >= 49.00 Hz

Work on this equipment should only be done by properly trained personnel who are qualified to work on this
type of equipment. Failure to comply with this requirement could expose the worker, the equipment and the building
and its inhabitants to the risk of injury or property damage.
The instructions on this service bulletin are written assuming the individual who will perform this work is a fully
trained HVAC & R journeyman or equivalent, certified in refrigerant handling and recovery techniques, and knowl-
edgeable with regard to electrical lock out/tag out procedures. The individual performing this work should be aware
of and comply with all Johnson Controls, national, state and local safety and environmental regulations while car-
rying out this work. Before attempting to work on any equipment, the individual should be thoroughly familiar with
the equipment by reading and understanding the associated service literature applicable to the equipment. If you do
not have this literature, you may obtain it by contacting a Johnson Controls Service Office.
Should there be any question concerning any aspect of the tasks outlined in this bulletin, please consult a
Johnson Controls Service Office prior to attempting the work. Please be aware that this information may be time
sensitive and that Johnson Controls reserves the right to revise this information at any time. Be certain you are
working with the latest information.

Product Technical Support


SI0364 (1117)

FRICK I/O BOARD COMMUNICATIONS


In software version 00 the communications initialization to the Frick board was broken. This was fixed in this V00A
software release.

BOOT CHECKSUM TEST


In the 02430 microboard the capability was added to skip the boot up checksum test except the first time that a new
version of software is loaded. This allowed the microboard to boot up quicker. The 03630 microboard is much faster
and therefore the need to skip the boot up checksum test is not needed. This Boot Checksum Test enable/disable
button was removed from the Diagnostics screen in this software release.

CLOCK ENABLE/DISABLE
In the 03630 microboard, the clock cannot be enabled or disabled through software. This setting was removed from
the Setup screen. The 03630 microboard battery will last about 10 years even without disabling the clock.

2 JOHNSON CONTROLS

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