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27
Error
No.
Warning
message
Possible causes
Corrective actions
E:
2
.
4
PIPE SENSOR
SHORT
Sensor short
See E:
2
.
1
E:
3
.
1
PIPE TEMP HIGH Water pipe
temperature
too high
If Temperature sensor
reading is higher than
the maximum exposure
temperature of the
HWAT cable: HWAT-R
2
or
HWAT-P
1
[
185
°F (
85
°C)] Water
heater sensor failure
Sensor has not been
installed Sensor or
sensor cable defect
(only when water heater
sensor “On” is selected)
Check Sensor and Boiler
temperature.
E:
3
.
2
BOILER TEMP
HIGH
Water heater
temperature too high if
Temperature sensor
reading is higher than
the maximum exposure
temperature of the HWAT
cable:
HWAT-R
2
or HWAT-P
1
[
185
°F (
85
°C)]
Check Sensor and Boiler
temperature.
E:
4
.
1
BOILER TEMP
LOW
Water heater
temperature is lower
than maintain
temperature set point
of the HWAT-ECO-GF
Check water heater
temperature (also indicated
in STATUS of HWAT-ECO-GF
menu).
Check maintain
temperature setting at
HWAT-ECO-GF.
Check temperature sensor
mounting.
E:
4
.
2
PIPE TEMP LOW Water heater
temperature is lower than
maintain
temperature set point of
the HWAT-ECO-GF
See E:
4
.
1
E:
5
HEATING CABLE
DISCONNECT
Low or no current alarm
No current measured
when the circuit should
be on
Confirm that heating
cable is connected to the
controller.
E:
6
.
1
INTERNAL
ERROR
Internal error
Disconnect HWAT-ECO
controller and replace unit.
When reporting this error,
provide the exact error
number, cable type, cable
length and the setpoint
temperature.
E:
6
.
2
INTERNAL
ERROR
Internal error
Disconnect HWAT-ECO
controller and replace unit.
When reporting this error,
provide the exact error
number, cable type, cable
length and the setpoint
temperature.
