4-10 Controller Troubleshooting
TP-5672 11/95
voltmeter should read approximately 1/25 of the
line voltage. See Appendix B, Figure B-5.
b. If the system is three-phase and the
three-phase-sensing option is installed, connect
one test lead to P2-20 and the other to
TB-DC1-34. The voltmeter should read
approximately 1/25 of the line voltage. See
Appendix B, Figure B-5.
c. If the system is three-phase and the
three-phase-sensing option is installed, connect
one test lead to P2-21 and the other to
TB-DC1-34. The voltmeter should read
approximately 1/25 of the line voltage. See
Appendix B, Figure B-5.
d. Remove Power from the logic board. Disconnect
the P2 ribbon cable connector. Recheck the P2
points on the power supply board in steps 4a, 4b,
and 4c. If the voltage readings taken in steps 4a,
4b, and 4c are now correct, either an accessory
or the main logic board is bad.
5. If any of the voltage readings in step 4 were
incorrect, replace the power supply board. If all of
the voltage readings in step 4 were correct,
calibrate the logic board emergency source voltage
by performing the steps below.
Calibrate The Logic Board
Emergency
Source Voltage
1. Three-phases sources can be sensed as either
three-phase or single-phase. However, to have
three-phase sensing the three-phase-sensing
option DD-05-K must be installed. If the
three-phase sensing option is installed and
three-phase sensing is desired choose emergency
three-phase sensing in Menu Index 7.
2. If the emergency source is single-phase, or the
option DD-05 is not installed, the emergency source
can only be sensed as single-phase. In Menu Index
7 choose single-phase sensing.
NOTE
When calibrating either the normal source or
emergency source, never auto-zero the source
unless it is zero volts. If source voltage is present,
and the YES key is pressed and entered at the
AUTO-ZERO message, the logic board will always
read the system voltage as zero volts.
3. Read this step completely before performing it.
Using the menu in Index 12 of the program menu,
press the YES key when the E-AUTO-ZERO?
message appears. Do not press the ENTER key
afterwards.
4. Disconnect the emergency power source.
5. Press the ENTER key.
6. Observe the ENTRY ACCEPTED message on the
LCD.
7. When the message on the LCD again reads,
E-AUTO-ZERO?, reconnect the emergency power
source.
8. Press the MENU Arrow Down key.
Single-Phase Sensing
9. If single-phase sensing is used, perform this step. If
the value displayed on the LCD after E-VOLT VAC
is not between 60% and 80% of the system voltage,
replace the logic board assembly. If the value is
between 60% and 80% of the system voltage,
measure the emergency system voltage. Measure
the emergency system voltage by connecting one
test lead of a voltmeter to TB-AC1-EA. Connect the
other test lead to TB-AC1-EC. Enter the measured
value at the LCD message E-VOLT VAC. Press the
ENTER key.
Three-Phase Sensing
10. If the emergency source is three phase and
three-phase
sensing
is
desired,
the
three-phase-sensing option DD-05-K must be
installed. If the option is installed and three-phase
sensing is used, perform this step. If the value
displayed on the LCD after E-PH A-C VAC, E-PH
A-B VAC, and E-PH B-C VAC is not between 60%
and 80% of the system voltage, replace the logic
board assembly. If the value is between 60% and
80% of the system voltage, measure the
emergency system voltage by performing the
following three steps.
a. Connect one test lead of a voltmeter to
TB-AC1-EA. Connect the other test lead to
TB-AC1-EB. Enter the measured value at the
LCD message E-PH A-B VAC. Press the
ENTER key. Press the MENU arrow down key.
b. Connect one test lead to TB-AC1-EB, and
connect the other test lead to TB-AC1-EC. Enter
the measured value at the LCD message E-PH
B-C VAC. Press the ENTER key. Press the
MENU arrow down key.
c. Connect one test lead to TB-AC1-EA, and
connect the other test lead to TB-AC1-EC. Enter
the measured value at the LCD message E-PH
A-C VAC. Press the ENTER key.
11. Press the RESET MENU key and then the ENTER
key to store the setpoints.
NOTE
If the system will not calibrate, replace the logic
board assembly.
