nvent Raychem HWAT-ECO V4, Manual

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Symptom Probable Causes Corrective Actions
“ERROR 7” displays
(buzzer beeping
simultaneously; and
error LED “ !
esc
” on)
Water heater temperature too
high. Will pop up if Tsensor
is higher than the maximum
exposure temperature of the
HWAT cable: HWAT-M (65°C).
HWAT-R (85°C)
1. Check boiler
temperature
2. Check temperature
sensor mounting
location.
“ERROR 8” displays
(buzzer beeping
simultaneously; and
error LED “ !
esc
” on)
No power supplied prolonged
period of time~30days.
Clock reset to default
“01.01.2001 00:00” displays
Set date and time;
rechargeable battery must
be powered for 48 h. See
3.1.2.
Water heater alarm
light is on
Water heater temperature is
lower than maintain temperature
set point of the HWAT-ECO
Check water heater
temperature (also indicated
in INFO of HWAT-ECO
menu; See 3.3.4.2 Check
maintain temperature
setting at HWAT-ECO.
Check temperature sensor
mounting
”Mode Quickstart”
displays
Alarm sounds when user is
initializing or reinitializing the
system
Alarm will clear when user
completes the initialization
or re-initialization process
No display Loss of power Restore power
Water temperature
too low
1. Water heating cable
temperature is too low
2. Installed heating cable is
different from the program
selected
3. Insulation thickness deviates
from the required insulation
thickness
4. The ambient temperature
value entered is too high
(1) Check water heater
temperature and timer
program.
(2) Change heating cable
type in HWAT-ECO (can
only be done in Quickstart).
See 3.1.3.
(3) Adjust power correction
factor. See 3.3.1.4.
(4) Change value of
ambient temperature. See
3.1.5.
Water temperature
too high
1. Water heating cable
temperature is too high
2. Insulation thickness deviates
from the required insulation
thickness
3. The ambient temperature
value entered is too low
(1) Change heater type in
HWAT-ECO (can only be
done in Quickstart). See
3.1.3.
(2) Adjust power correction
factor. See 3.1.4. (3)
Change value of ambient
temperature. See 3.1.5.
Can’t access
programming mode
1. Controller is password-
protected
Enter your 4-digit
password. If you forgot
your password, enter the
backup password: 6922 to
unlock the controller