Metrohm 709 IC Pump - Manual (Page 41)

4.4 Diagnosis
709 IC Pump
33
4.4.2 Entry of diagnostics with automatic display test
1. Power off.
2. Disconnect all external connections (cables at rear) except mains
cable.
3. Press and hold <R/S> key 3 (keep pressed) and power on.
The display 1 shows for about 3 s the switch-on test pat-
tern and all 6 LEDs are switched on for visually checking.
8.8.8.8.8
The display 1 shows for about 3 s the number of the in-
stalled program version.
7 0 9.1 0
4. Release <R/S> key 3.
4.4.3 Keyboard test
1. Press <R/S> 3.
1 1
2. Press <SELECT> 4.
1 2
3. Press < ↓ > 5.
1 3
4. Press < ↑ > 6.
1 4
5. Press <EXT> 8.
1 5
6. Press <PURGE> 9.
1 6
2 x x
(x x) = not relevant