Vaisala PWD22 - Page 110

USER'S GUIDE ____________________________________________________________________
108 _________________________________________________________________ M210543EN-F
Status Message
Typical
Min. / Max.
Fault
Description
Action
P12
Positive voltages
of the DC/DC
converter for the
transmitter and
receiver
11.5 V
10 V / 14 V
<10.0 V
>14.0 V
'+-12 V POWER
ERROR'
DC/DC converter
is overloaded or
working wrong.
P12
measurement
may also fail due
to heavy
electrostatic
discharge to
RAINCAP
®
plate.
1) Reset.
2) Disconnect
transmitter.
3) Change the
PWC22/52
control unit.
M12
Negative
voltages of the
DC/DC converter
for the transmitter
and receiver
-11.5 V
-14 V / -10 V
<-14.0 V
>-10.0 V
'+-12 V POWER
ERROR'
DC/DC converter
is overloaded or
working wrong.
M12
measurement
may also fail due
to heavy
electrostatic
discharge to
RAINCAP
®
plate.
1) Reset.
2) Disconnect
transmitter.
3) Change the
PWC22/52
control unit.
DRD
Instant value of
RAINCAP
®
Rain
Sensor
64...900Hz
64 / DRY
< 64 Hz
'DRD ERROR'
Cable
disconnected or
rain detector
RAINCAP
®
short-
circuits
1) Check
connector X7
and X6 on the
PWC22/52
control unit.
2) Change the
RAINCAP
®
Rain Sensor.
BL
Background
luminance
4...20000
cd/m²
4 cd/m² /
20000 cd/m²
'LUMINANCE
SENSOR
ERROR'
Cable
disconnected or
PWL111 short-
circuits
Check
connector X3
pins 1,2,3,4.
RELAYS
States of the
three external
relays controls
ON / OFF
-
-
-
HOOD HEATERS
Hood heater
automatics are
switched either
on or off.
ON / OFF
-
If set to ON state,
heater current
starts flowing
when ambient
temperature goes
below +2°C and
stops when it
raises over +5°C.
Heaters can
be tested by
the HEAT ON
command.
Warming of
the heater
foils should be
felt by hand. If
not check
powering and
cabling.