JOHNSON CONTROLS
117
SECTION 3 - OPTIVIEW DISPLAY MESSAGES
FORM 160.10-O1
ISSUE DATE: 4/27/2018
3
HARMONIC FILTER SAFETY SHUTDOWN
MESSAGES
The following safety shutdown messages are displayed
on compressor motor variable speed drive applications
with the optional harmonic filter installed. These mes-
sages are generated by events that occur within the
VSD harmonic filter. Service and troubleshooting in-
formation is contained in the
Variable Speed Drive –
Service Manual (Form 160.00-M1).
Harmonic Filter – High Heatsink
Temperature
(Style D VSD)
The harmonic filter power assembly has one heat-
sink thermistor on the 503 HP units, and two heatsink
thermistors on the 790 HP units. If the temperature on
any heatsink exceeds 167°F, the unit will shut down.
This message is usually an indication of a low cool-
ant level in the VSD cooling loop. The chiller can be
started after the fault condition clears, the OVERTEMP
RESET button on the filter logic board is pressed, and
the compressor switch is placed in the
STOP/RESET
(O)
position.
Harmonic Filter – High Baseplate
Temperature
(Applicable to VSD with part number 371-02767-
XXX (60 Hz) and 371-03700-XXX (50 Hz))
This shutdown occurs when the baseplate temperature
exceeds 174°F. The chiller can be started after the fault
condition clears, the OVERTEMP RESET button on
the filter logic board is pressed, and the compressor
switch is placed in the
STOP/RESET (O)
position.
Harmonic Filter – High Baseplate
Temperature
(VSD part number 371-03789-xxx (503HP 60 Hz;
419HP 50 Hz)
The chiller has shutdown because the baseplate tem-
perature has increased above 194ºF. The chiller can be
started after the fault condition clears, the OVERTEMP
RESET button on the filter logic board is pressed and
the compressor switch is placed in the
STOP/RESET
(O)
position.
Harmonic Filter – High Total Demand
Distortion
This shutdown indicates the filter is not operating cor-
rectly and the input current to the VSD/Filter is not
sinusoidal. This shutdown will occur if the TDD ex-
ceeds 25% continuously for 45 seconds. TDD is an
acronym for Total Demand Distortion, a term defined
by the IEEE Std 519-1992 standard as the “total root-
sum-square harmonic current distortion, in percent
of the maximum demand load current (15 or 30 min
demand)”. In the harmonic filter option supplied by
YORK, the displayed TDD is the total RMS value of
all the harmonic current supplied by the main power to
the VSD divided by the chiller Full Load Amps, in per-
cent. A standard VSD, less the optional filter typically
has an input current TDD level on the order of 28-30%.
The chiller can be started after the compressor switch
is placed in the
STOP/RESET (O)
position.
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