Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual page 292

SECTION 33 - DIAGNOSTICS AND TROUBLESHOOTING
7. If the Program Switch (DIP) is in the OFF posi-
tion, the applicable LED should be extinguished.
If the LED is not extinguished, the microboard is
defective.
8. When all desired tests have been performed, press
DIAGNOSTICS key to return to MAIN DIAG-
NOSTICS Screen.
Digital Outputs
1. IMPORTANT! - The following steps cannot be
performed until the Motor Controller connection
between TB6-1 and TB6-53 has been removed.
This connection could be a jumper or it could be
a connection from external devices in the start-
er. The Program will prevent manual control of
Digital Output devices until this connection is re-
moved.
2. The Digital Outputs are listed on this screen ac-
cording to Relay and Triac number (KI, Q3, etc).
Figure 29 on Page 78 shows the external devic-
es that are connected to these Relays and Triacs
and the functions of each one.
3. Press SELECT key. An arrow will appear ad-
jacent to relay KO. With software version
C.OPT.01.23.307 (and later), when Japanese, Ko-
rean or Chinese language is selected, the arrow is
replaced with a green box.
4. Select a relay or triac for manual control by using
the ◄ and ► keys to place the arrow adjacent to
the desired device.
5. Press the ENABLE OUTPUT key to enable the
selected output. The LED adjacent to the selected
output should illuminate. If it does not, perform
Keypad Diagnostic test. If a relay is selected, it
should energize, closing its contacts. If a triac is
selected, it will turn on, energizing the device it
is connected to. If the relay does not energize or
triac does not turn on, perform appropriate trou-
bleshooting procedure below.
6. Press the DISABLE OUTPUT key to disable the
selected output. The LED adjacent to the selected
output should extinguish. If it does not, perform
Keypad Diagnostic test. If a relay is selected, it
should de-energize, opening its contacts. If a triac
is selected, it will turn off, de-energizing the de-
vice it is connected to. If relay does not de-ener-
gize or triac does not turn off, perform appropriate
troubleshooting procedure below.
292
7. When all desired tests have been performed, press
DIAGNOSTICS key to return to the MAIN DI-
AGNOSTICS Screen.
8. Install Motor Controller connection from TB6-1
to TB6-53 removed in step 1.
Digital inputs Troubleshooting
If any of the Digital inputs tests fail to perform as de-
scribed above, perform the following steps in sequence.
Refer to Figure 26 on Page 76 and applicable wiring
diagram referenced at the beginning of SECTION 26
- LARGE TONNAGE CHILLER (LTC) I/O Board. If
a defective component is found during any of the fol-
lowing steps, replace the component as instructed and
repeat the Digital inputs Procedure above to determine
if the problem has been resolved.
1. Remove I/0 Board ribbon cable. Using an Ohm-
meter, perform a continuity check on I/O Board
ribbon cable J1-21 to J19-21, J1-22 to J19-22 and
applicable output pin of function that failed in
procedure above. If an open circuit is detected, re-
place ribbon cable. Otherwise, install ribbon cable
and proceed to next step.
2. Measure the +5VDC supply voltage to the I/0
Board on the I/0 Board between J1-21 and J1-22.
If greater than 4.5VDC, proceed to next step. If
less than 4.5VDC, disconnect the ribbon cable at
I/O Board J1 and repeat the measurement at J1.
If less than 4.5VDC, replace the microboard and
re-install the ribbon cable.
3. With 115VAC (plus or minus 10%) applied to
the I/O Board Digital Input that failed in pro-
cedure above, the applicable I/O Board output
at J1 should be at a Logic Low level (less than
1.0VDC). If it is greater than 1.0VDC, replace the
I/O Board. If the output is at a Logic Low level,
the applicable LED should be illuminated. If the
LED is not illuminated, replace the microboard.
4. With 0VAC applied to the I/O Board Digital Input
that failed in procedure above, the applicable I/O
Board output at J1 should be at a Logic High level
(greater than 4.0VDC). If it is less than 4.0VDC,
replace the I/0 Board. If the output is at a Logic
High level, the applicable LED should be extin-
guished. If it is not extinguished, replace the mi-
croboard.
FORM 160.54-M1
JOHNSON CONTROLS