ABB TRIO-20.0/27.6-TL-OUTD

- 125 -
000208CG
8 - Maintenance
Replacing the back-up battery
The back-up battery may need to be replaced when:
1. An error message is displayed
2. The date and time settings are reset
The battery is of the CR2032 type and is installed on the communication
board, but is accessible only by removing the protective plastic cover
installed over the DC high-voltage sections.
Back-up battery replacement procedure:
1. Disconnect the strings by opening the AC and DC disconnect switches
external to the inverter (versions base/S2) or the AC+DC disconnect
switch (versions S2F/S2X) and thereafter the quick t input connectors.
By opening the AC+DC disconnect switch alone (versions S2F/S2X), the DC input voltage is
still present on the communication board.
2. Remove the plastic cover installed over the communication board
3. Remove the battery to be replaced
4. Install the new battery taking care to handle it with insulating gloves to
ensure it is not discharged and respecting the polarity displayed on the
communication board silkscreen
5. Replace the plastic cover over the communication board
6. Reconnect the input strings (versions S2F/S2X) and turn the inverter on
~30°
CARD
J10
PC
OFF
TERM.
120
OFF
J8
ON
PMU
S2
S4
ON
PC
PMU
J9
PMU -T/R
J6
CARD
COM
PMU +T/R
GND COM
+5V OUT
R ON/OFF
J4
PC
SH
J7
PC +T/R PC -T/R
GND
RTD3
RTD3
24V
-WTACH
J5
+WTACH
PT100
RTD2
RTD2
PT1000
J3
J2
PMU
CR2032
A2
COM
A2
RTD1
RTD1
A1
A1
COM
S6
NORM
S3
S7
COUNTRY/LANG SEL
K1
S8
MEMORY
ALARM
NC
C
BT1
NO
S5
PAR IND SERV
A1
J16
J14
J11
AN2 AN1
V
mA
V
mA
S1
a20