Operation Phases Of Control And Regulation Centre Lmu (Press Information Button) - Potterton Paramount two Installation, Operation & Maintenance Manual

Servicing
Fault
Fault description
code
Impermissible LPB segment number
140
or equipment number
Incompatibility between LPB inter-
148
face/basic unit
151 Internal fault of LMU
152 Fault of LMU-parameter setting
153 Boiler locked (reset pressed)
Plausibility criterion of electronic
154
STB infringed
160 Speed threshold not reached
161 Max. speed exceeded
183 Boiler in parameter setting mode
1)
Stopping, start prevention, re-start after fault removal
2)
Check parameter according to table Setting Table Heating Specialist and program basic settings or call-up internal LMU SW-
diagnosis code and correct respective parameter fault according to fault information!
3)
Switching off and interlock can only be unlocked by reset
4)
Only fault display, no switching off
10.12 Operation phases of control and regulation centre LMU
(Press information button)
Display Operating Status
0 Standby (no heat demands)
1 Start prevention
2 Fan startup
3 Pre-purging time
4 Waiting time
5 Ignition phase
6 Safety time constant
7 Safety time variable
10 Heating mode
11 Hot water mode
Parallel operation for heating and hot
12
water
74
Explanations/causes
Check setting of regulation
Check setting of regulation
Check parameters (see setting table heating specialist or
call-up values),unlock LMU, replace LMU, heating specialist
3)
Repeat programming
Operate unlocking button
Return temperature higher than flow temperature or to fast
temperature increase in the boiler
Fan possible defective, speed threshold set wrongly, no vol-
tage at the output transformer (program number 5920)
Check parameters
3)
Description of function
Burner on stand-by
No internal or external release exists (e.g. no water
pressure, lack of gas)
Self-test for burner start and fan startup
Pre-purging, fan deceleration time to starting load
speed
Internal safety tests
Ignition and start of safety period flame forming
Ionisation current build-up
Flame monitoring with ignition
Flame monitoring without ignition
Room heating mode, burner in operation
HW-tank charging, burner in operation
Heating and hot water mode
1)
3)
POTTERTON COMMERCIAL
1)
3)