York YLAA0195HE, Manual

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185
JOHNSON CONTROLS
FORM 150.72-NM3 (1020)
ISSUE DATE 10/05/2020
SECTION 9 – SERVICE AND TROUBLESHOOTING
9
LD12723
The micropanel is capable of supplying a printout of
chiller conditions or fault shutdown information at any
given time. This allows operator and service personnel
to obtain data and system status with the touch of
the keypad. In addition to manual print selection,
the micropanel will provide an automatic printout
whenever a fault occurs. Detailed explanation of the
print function is given under “Print Key” located in the
“Keypad and Display” section of this IOM.
Johnson Controls recommends the field tested WEIGH-
TRONIX model 1220 printer (or former IMP 24). This
is a compact low cost printer that is ideal for service
work and data logging.
The WEIGH-TRONIX printer can be obtained by
contacting WEIGH-TRONIX for purchase information
at:
WEIGH-TRONIX
2320 Airport Blvd.
Santa Rosa, CA 95402
Phone: 1-800-982-6622 or 1-707-527-5555
(International Orders Only)
The part number for the printer that is packaged
specifically for YORK is P/N 950915576. The cable
to connect the printer can either be locally assembled
from the parts listed, or ordered directly from WEIGH-
TRONIX under part number 287-040018.
Parts
The following parts are required:
1. One WEIGH-TRONIX model 1220 printer.
2. 2.25" (5.7cm) wide desk top calculator paper.
3. 25 ft. (7.62m) maximum length of Twisted Pair
Shielded Cable (minimum 3 conductor), #18 AWG
stranded, 300V minimum insulation.
4. One 25-pin Cannon connector and shell.
Connector: Cannon P/N DB-25P or equivalent.
Shell: Cannon P/N DB-C2-J9.
Assembly and Wiring
All components should be assembled and wired as
shown in Fig. 63. Strip the outside insulation back
several inches and individual wires about 3/8" (9.5 mm)
to connect the cable at the Microboard. Do not connect
the shield at the printer-end of the cable.
Obtaining a Printout
A printout is obtained by pressing the “PRINT” key on
the keypad and then pressing either the “OPER DATA”
key or “HISTORY” key.
FIG. 63 – PRINTER TO MICROBOARD ELECTRICAL CONNECTIONS
OPTIONAL PRINTER INSTALLATION
TB3-3 TXD
TB3-2 CTS
TB3-5 GND
TB3
2 RD
7 SG
5 CTS
Chiller Microboard
Printer
Do not connect shield
at printer end.
Shield (connect shield to Pin 5
of the connector.