Bell and Gossett 70E Installation, Operation & Maintenance Instructions Manual page 20

Multiple pump & control pressure booster systems
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6.15.3
CONDITION: I/O Error on the display and pump 2
red LED is on. Watch dog LED CR6 is on.
Corrective Action:
Pumps will run in manual operation according to
paragraph 5.4 above. Replace the operator interface
and the I/O board.
6.15.4
CONDITION: E2 Bad. System Halted. Call factory
for assistance. Watch dog LED CR6 is on.
Corrective Action:
Pumps will run in manual operation according to
paragraph 5.4 above. Replace the operator interface.
6.15.5
CONDITION: No Program Found on the display and
pump 3 red LED is on. Watch dog LED CR6 is on.
Corrective Action:
Pumps will run in manual operation according to
paragraph 5.4 above. Replace the operator interface.
6.15.6
CONDITION: E2 Defaults Set on the display. Watch
dog LED CR6 is not on.
Corrective Action:
Remove EPROM. Watch dog LED CR6 will turn on.
Pumps will run in manual operation to paragraph 5.4
above. Replace the operator interface.
6.15.7
Display Blank
A. Watch dog LED CR6 is off.
Corrective Action:
Confirm power to OIP with at least 1 LED on or
measure 120 volt. A. C. at J6 L1 and N. If power
present reboot and if display stays off, replace OIP.
DANGER: Troubleshooting live control panels ex-
poses personnel to hazardous voltages. Electrical
troubleshooting must only be done by a qualified electri-
cian. Failure to follow these instructions could result in
serious personal injury, death, and/or property damage.
B. Watch dog LED CR6 is on.
Corrective Action:
None. No display. This condition except back light
is on. Unit will run in manual per paragraph 5.4.
6.15.8
Key Board Inoperative
A. Watch dog LED CR6 is off.
Corrective Action:
Be sure power is on by checking or observing dis-
play or at least one LED. Press RESET and HELP
keys. If condition prevails replace OIP.
B. Watch dog LED CR6 is on.
Corrective Action:
Only 4 keys are active: START/STOP, PUMP 1,
PUMP 2, and PUMP 3. If these keys are inopera-
tive replace the OIP. Unit will run in manual per
paragraph 5.4.
20
6.15.9
LEDs Malfunction
A. Observe that all LEDs turn on during the booting
process. Watch dog LED CR6 is off.
Corrective Action:
If any fail to operate replace the OIP.
B. Watch dog LED CR6 is on. Only the red HAND
LED and the 3 green LEDs with one for each
pump key will turn on, or off. Unit will run in manual
per paragraph 5.4.
Corrective Action:
Replace OIP.
C. Watch dog LED CR6 is off but all LEDs or some
LEDs are off.
Corrective Action:
1. Check that the ribbon cable is plugged in.
2. Check for ribbon cable damage.
3. If all LEDs off check incoming power and
fuse F1.
4. Reboot.
5. Replace OIP unit.
WARNING: Electrical shock hazard. Multiple power
sources. The off position of the HAND-OFF-AUTO
switch does not disconnect all of the power sources in
the Technologic panel. All power sources must be dis-
connected prior to entering the control panel. Failure to
follow these instructions could result in serious per-
sonal injury, death, and/or property damage.
6.15.10 Selector Switch Malfunctions
Press SERVICE TEST –
A. In local, input 1 should be "1" (J4).
B. In remote, input 1 = 0 with remote contact open
and input 2 = "1" (J4).
Corrective Action:
A and B are not present; correct wiring or replace
the switch. See wiring diagram for correct wiring.
A new switch may be obtained from the factory.
6.15.11 Suction Transducer Fault
A. Alarm per 4.5.2 indicates this fault.
B. Confirm with analog input test of CHNL 1 per 6.10.3.
Corrective Action:
1. Disable transducer by entering user menu per
4.3 and changing suction pressure span (item
11) to "0". Alarm message turns off. Low and
high suction is disabled.
2. Replace this transducer.
6.15.12 System Transducer Fault
A. Alarm per 4.5.2 indicates this fault.
B. Confirm with analog input test of CHNL 2 per 6.10.3.
Corrective Action:
1. Disable transducer by entering user menu per
4.3 and changing system pressure span (item
37) to "0". Alarm message will turn off. Low and
high system PSI and PSI staging is inoperative.
2. Replace this transducer.

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