Fault Clearance - Honeywell Home 447 Installation And User Manual

READ LOOP
Main Loop Service Loop
Press button
> 3 sec
Window 1
Window S1
Window 2
Window S2
Window S3
MAIN LOOP
Heat meter
Accumulated energy since
initial operation selected
energy unit
all on 3 sec. <–> 1 sec.
Energy on reading date in reading date
selected energy unit
SERVICE LOOP
Heat meter
current flow in m temp. difference, always in
3
°C to 1 decimal place
forward temp., always in
current power, always in
°C to 1 decimal place kW, even if basic display
e.g. in MWh *1/*2
return temp., always in accumulated volume since
initial operation in m
°C to 1 decimal place
Decimal places
*1 Main display no decimal place –> 3 decimal places
*2 Decimal place in main display –> decimal place same
as main display
CHECK THE FOLLOWING POINTS BEFORE LOOKING
FOR A FAULT IN THE HEAT METER ITSELF
· Is the heating system in operation?
· Is the circulating pump running?
· Are the stop valves fully open?
· Is the pipe clear (clean strainers)?
· Are all the seals intact (tampering)?
The LC display has a power save mode.
The display is activated by pressing a
button and showes the accumulated
energy since initial operation ->basic
display
Next display -> press button < 3 sec
Switch from main loop to service loop
->press button < 3sec
Display switches off automatically and
changes to the power save mode if the
button is not pressed for 5 minutes
Basic display
+meter is active
Segment test of LC display,
then automatic change
to date reading.
Attention: changeover
time 4 sec
all off
Alternates between energyH
˚V > heat on reading date
and reading date. (3 sec.<->
1 sec.) If the first reading
date has not yet been rea-
ched, the production date
is shown.
next reading date
DD.MM.YY
secondary address 8 digits
press button > 3 sec
SW version number
*2
3 119 –> Complete SW
version
02 –> SW version of part
not subject to calibration
01 –> SW version of part
subject to calibration
DIAGNOSTIC DISPLAY
Attention: Activate LCD with button
Display Fault description
C 1 Basic parameter part of RAM damaged.
F 1 Sensor short-circuit, sensor break.
F 3 Return sensor registers a higher temperature than forward
sensor. Check if the heat meter/temperature sensors are located
in the correct lines.
(Not for cooling & heat meter)
F 4 Flow sensors defective.
F 5 Heat meter operating correctly. Optical communication is tem-
porarily out of operation to save power.
F 6 Volume measuring component is installed opposite to the
direction of flow.
Cooling & heat meter
Accunu-
lated cold
since initial
operation
Accunula-
ted heat
since initial
operation in
selected unit
all on 3 sec. <–> 1 sec.
Cold on reading date
Heat on reading date
Cooling & heat meter
current power always in kW even if next reading date
Current flow in m
3
basic display e.g. in MWh *1/*2
forward temp. always in accumulated cold volume since
°C to 1 decimal place initial operation in m
return temp. always in
accumulated heat volume since
°C to 1 decimal place initial operation in m
temp. difference, always next reading date
in °C to 1 decimal place cold DD.MM.YY
with sign
· Is the meter rating correct?

FAULT CLEARANCE

Display shows temperatures but no flow rate:
· Check direction of meter and correct if necessary
· Remove meter, blow into meter and check that the impeller turns or the + sign
(active flow) flashes in the display.
Basic display
calibrated memory
H ˚V > heat
uncalibrated memory
Segment test of LC display , then
automatic change to date reading
Attention: changeover time
4 sec.
all off
Alternates between energy on
reading date and reading date (3
sec. <–> 1 sec.) If the first reading
date has not yet been reached, the
Cold reading date
production date is shown
C ˚V > cold
H ˚V > heat
Heat reading date
heat DD.MM.YY
secondary address 8 digits
*2
3
press button > 3 sec
Firmware version number
*2
3
2002 –> Complete SW
version
02 –> SW version of part
not subject to calibration
01 –> SW version of part
subject to calibration