Appendix; 10.1 Fault Codes - Benchmark RD 532i Installation And Servicing Instructions

Appendix

10 Appendix

10.1 Fault Codes

More detailed fault finding procedures are described in the Service Booklet for the Engineer number 7 181 465 347.
Display
code Description
A1 pump has run dry
A7 Hot water NTC sensor defective.
A8 Break in communication
b1 Code plug not detected.
C1 Fan speed too low.
Jumper 8-9 not detected.
d3
CH flow NTC sensor defective
E2
E9 Safety temp. limiter in CH flow has tripped.
Flame not detected.
EA
F0 Internal error.
F7 Flame detected even though appliance
switched off.
FA Flame detected after gas shut off.
FC Text display not detected.
Fd Reset button pressed by mistake.
P1, P2, Please wait, initialisation in progress.
P3, P1...
Table 18
46
Remedy
Check system pressure, add water and bleed
system as necessary
Check hot water NTC sensor and connecting
lead for circuit breaks/short circuits.
Check connecting lead to TR2
Insert code plug correctly, test and replace if
necessary.
Check fan lead and connector, and fan; replace
as necessary.
Connector not connected, link missing, under-
floor heating limiter tripped.
Check CH flow NTC sensor and connecting
lead.
Check system pressure, check safety temp. lim-
iters, check pump operation, check fuse on pcb,
bleed appliance.
Is gas cock turned on? Check gas supply pres-
sure, power supply, igniter electrode and lead,
ionisation sensing electrode and lead, flue duct
and CO2 level.
Check electrical connector contacts, program-
mer interface module ignition leads are not
loose; replace pcb if necessary.
Check electrode assembly, dry pcb. Flue clear?
Check gas valve and wiring to gas valve. Clean
condensation trap and check electrode assem-
bly. Flue clear?
Check connecting lead between Text display
and Heatronic, replace Text display if necessary
Press reset button again
24 V fuse blown. Replace fuse.
6 720 611 447 GB (03.11)