Italtherm Time Power 115 K, Instruction Handbook Manual

35

T

E

C

NI

C

O

T

E

C

H

N

ICI

A

N

fB 

actual

Probable cause

Suggested solutions

E22 

Non-consistent stored data

user: 

Cut boiler electric power supply off through the relevant external omnipolar switch and restore it after some minutes. If 

shut-down continues or occurs again, call the Assistance Service.
Adjust boiler again ("Heating max. power adjustment" on page 32 and "Settings on electronic board" on page 33) to update 
board memory data.
Replace management board (following operations: "Heating max. power adjustment" on page 32 and "Settings on electronic 
board" on page 33).

E24

Underfloor heating system 
safety thermostat triggering:
delivery temperature to 
system is too high;
defect, fault or malfunctioning 
of underfloor heating system.

Underfloor heating system and floor tiles are subject to sudden changes in temperature and therefore a well-built underfloor 
heating system foresees one or more safety thermostats which, when intervening, shut down boiler.
Try boiler restore process by pressing 

 (after waiting for a sufficient period of time to enable system cooling and thermostat 

deactivation). If shut-down occurs again, call the Assistance Service.

Note:

 In presence of this alarm, also hot water production is blocked. 

In case of no underfloor heating system

, verify integrity of the jumper connecting terminals 57 and 58 of the M12 connector 

(see "Boiler electric diagram:" on page 16).

When underfloor heating system is present

, verify system delivery temperatures on boiler and control unit for low-temperature 

systems (if present). Replace faulty or out-of-tolerance thermostats. Verify correct position of thermostats on system.

E31 

Communication error 
between Remote Control (if 
present) and boiler

user: 

select 

Summer

 mode by pressing

.

Problems on optional Remote Control electric line (passes close to power supply cables or other electromagnetic field sources, 
faulty connection; cable longer than 50 metres).

E33 

E34

Wiring setting error.

user: 

Try boiler restoration pressing key

 . If shut-down continues or occurs again, call the Assistance Service.

Refer to the electric diagram (page 16) and check connection integrity, in particular the possible connections (jumper) present 
between two contacts of the same connector (on wiring connections to electronic board).

E35

Parasitic flame
Control electronics has 
detected the presence of 
the flame in the burner in 
a moment in which it is not 
foreseen

Wait for boiler automatic restoration (5 minutes) or manually restore boiler function by pressing 

. If shut-down continues 

or occurs again, call the Assistance Service.

 Recognise any possible malfunctioning of gas valve (which does not interrupt gas flow and therefore burner stays on) or 

electronics, flame control section (which detects flame presence also when this is not present).

E38 

External temperature probe 
(optional) failure.
External temperature probe, 
which was recognised and 
working, is now faulty

user: 

Call Assistance Service.

Boiler works both in heating and in domestic water function, as if probe had never been installed, therefore, heating system temperature adjustment will be carried out directly and not according 

to external temperature. The error is displayed to inform that the installed accessory is not efficient any more (consider that, at a superficial analysis, it looks like boiler is working properly). 

Important: if boiler is electrically turned off and then on again, it is possible** that alarm is not displayed anymore, even if fault persists.

External temperature probe wiring check.
External temperature probe replacement.

**Alarm is triggered again only in case of probe resistance out of tolerance or in short circuit. Instead, in case of electric interruption of probe or relevant wiring, at power supply restoration, 

boiler considers external probe as absent and, in Winter mode, works in standard mode (sliding temperature deactivated).

E39

Freezing suspected
After a black-out, when power 
supply is restored, boiler 
detects temperatures of 
Heating and Domestic water 
probes equal or lower than 0°C

Display shows alarm code E39, while boiler inhibits burner ignition and activates circulation pump, letting water flow in hydraulic 
circuits.
If, in the meantime, temperatures detected by probes become higher than +1°C, alarm disappears and boiler goes back to standard 
operation.
Otherwise, alarm becomes permanent and freezing of water in one or more points of the hydraulic circuit of the boiler and/or of 
the system (with possible damages to frozen parts) is suspected. In this case, refer to a qualified technician.

 Recognise/replace parts damaged by freeze.

E42 

System error 
Fault of systems inside boiler
Mains electric power supply 
of out-of-tolerance

Investigate failure or fault referring to the technical documentation reserved to assistance centres.

E43

Water overtemperature on 
system return 

Water which goes back to boiler from heating system is too hot: besides indicating heating system malfunctioning, this might cause 
emission of too hot fumes and damage exhaust system. Before this happens, a specific safety control has triggered.
Wait 20-30 minutes to let boiler and system cool, the restore boiler function by pressing 

. It is not possible to restore operation 

before system cooling. If boiler shuts down again, refer to a qualified technician.