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Release R.1.3 UK 82
Warning
Maintenance may only be performed by a qualified service and maintenance engineer.
C03 (blocking error)
Reset error.
Too many resets in too
short a period.
Wait for the error to disappear (maximum 1 hour). If the error does
not disappear, the water heater controller must be replaced.
To replace the necessary parts, you must contact your installer.
C04 (blocking error)
Appliance selection
error.
Incorrect appliance
selection /
Incorrect selection
resistor.
1. Check whether the correct appliance has been selected. See
’9.5 Display the selected appliance’.
2. If the correct appliance is selected, fit the correct selection
resistor.
3. If incorrect appliance selected, select the correct one.
If the error does not disappear, you must contact your installer.
To obtain a selection resistor, you must contact your installer.
E01 (blocking error)
The temperature
protection at the top of
the tank has been
activated.
The temperature of the
water at the top of the
tank is > 85°C.
None. This is a temporary message that may appear from time to
time, but will disappear automatically.
E03 (blocking error)
Error in temperature
sensor T
1
at the top of
the tank.
The temperature
differential between
the two temperature
sensors in the tank is >
10°C over a period of
60 seconds or longer.
1. Check sensor position and wiring.
2. Reset the ThermoControl if necessary. Replace the sensor if
the error persists.
To replace the necessary parts, you must contact your installer.
E04 (blocking error)
Error in the dummy
sensor
(2)
.
The two dummy
sensors detect a
differential of >
10°C
over a period of 60
seconds or longer.
1. Check wiring from dummy 1 and dummy 2.
2. Reset ThermoControl if necessary. Replace the dummy sensor
if the error persists.
To replace the dummy sensor you must contact your installer.
1. Temperature sensor T
1
is a ‘2 in 1’ sensor, T
1
contains 2 NTCs for the high-limit thermostat and safety thermostat protection.
2. The dummy sensor consists of dummy sensor 1 and dummy sensor 2
3. The dummy sensor consists of dummy sensor 1 and dummy sensor 2
Table 10.2 Displayed errors (Sheet 10 of 10)
Code + Description Possible cause Solution Remark