BLUEHELIX TECH RRT 28 C
42 EN
cod. 354M1070 - Rev. 01 - 07/2018
3.4 Troubleshooting
Diagnostics
Blank LCD
LCD Fault codes
The display flashes and the relevant fault identification code appears.
There are faults that cause permanent shutdowns or Lock Outs (marked with the letter "A" for Alarm): to restore oper-
ation press the reset button once (detail 6 - fig. 1) for less than 1 second or use the RESET on the remote timer control
(optional) if installed; if the boiler does not restart, it will be necessary to eliminate the fault (see fault code table).
Other faults cause temporary shutdowns (marked with the letter “F” for Fault) which are automatically reset as soon as
the value returns within the boiler's normal working tolerance.
Make sure that the PCB is powered: using a digital multimeter, check supply volt-
age is within tolerance ( Range 195 – 253 Vac )
In the case of no voltage, check the wiring & check the external 3amp fuse.
To access the internal PCB fuse please see fig. 21 and fig. 52 when replacing
please ensure it is rated at (3.15AL@230VAC).
fig. 52- Fuse housing
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