Grundfos PHP A-1 4.0 Instruction Manual page 37

PHP A-1 Instruction Manual / Warnings and fault messages
No Message
E6: too man':1 PumP
E6
re-=uests Per Period
E7: write error I2C basic
E7
circuit board
E8: temPerat.sensor
E8
Tl short circuit
E9: temPerat.sensor
E9
Tl break
El0: transmitter Pl
E10
meas.signa1 too high
Ell: transmitter Pl
E11
meas.signa1 too 1ow
37
Description
If the lower working pressure
falls below a set value a
pump request occurs and a
pump starts. The quantity of
pump requests per interval
is monitored. By exceeding
of the upper limit this
message appears. Pumps
disabled.
The internal communication
at the I2C-bus on the basic
circuit board failed
The resistance of the sensor
is too low and falls below
the valid range.
The resistance of the sensor
is too high and exceeds the
valid range.
Measurement signal of
pressure transmitter P1
(plant pressure) is above the
normal valid range.
Measurement signal of
pressure transmitter P1
(plant pressure) is below the
normal valid range.
Check/Repair
- check if a permanent
decrease of plant pressure
occurs
- check valve pump is
defective
- configuration of the upper
working pressure has been
changed without using the
pressure settings function
(insufficient working
pressure difference)
- confirm message. If the
message appears anew
the basic circuit board
obviously is defective
- sensor connection shows
a short circuit or
is damaged
- sensor element is defective
- incorrect connection of
the sensor at the control
electronics
- sensor connection is
broken or damaged
- sensor element defective
- connection of pressure
transmitter P1 is incorrect
or damaged
- pressure transmitter is
defective
- measure input of basic
circuit board is defective
- pressure transmitter P1 is
disconnected
- connection of pressure
transmitter is incorrect or
damaged
- pressure transmitter is
defective
- measure input of basic
circuit board is defective
Necessary device options
for this message
no (contained in every
configuration
no (contained in every
configuration)
no (contained in every
configuration)
no (contained in every
configuration)
no (contained in every
configuration)
no (contained in every
configuration)