SECTION 4
POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION , OPERATION AND MAINTENANCE MANUAL
PAGE 18
PARAMOUNT
DISPLAY AND PARAMETER VALUES
Table 5:
Display and Parameter values for BMU control centre
NOTE:
Parameters in the groups “A, b, C & d” can only be displayed, parameters in group “P” can be altered.
Display 1)
Display
Description
Adjustment
Range
(Units)
Temperature
P
General
2)
A0
A1
A2
A3
A4
Fault diagnosis code (system)
3)
Boiler temperature (flow)
Hot-water sensor 1
Water or air pressure (not activated)
Automatic boiler operating phase (See Table 10)
(Code. No.)
(
°
C)
(
°
C)
(--.--)
(Code. No.)
*
•
*
o
o
*
4)
o
o
•
o
Actual Temperatures
b0
b1
b2
b3
b4
b5
b6
b7
Internal BMU SW diagnosis code
5
)
Boiler temperature (return)
Hot-water sensor 2 (not present)
Flue gas temperature (not present)
Currently outdoor temperature
Mixed outdoor temperature
Attenuated outdoor temperature
Mixer flow temperature (only when mixer module CIM is
connected.
(Code.No.)
(
°
C)
(
°
C)
(
°
C)
(
°
C)
(
°
C)
(
°
C)
(
°
C)
*
•
•
•
•
•
•
•
*
4
)
•
•
•
•
•
•
•
Other process values
C 1
C2
C3
C4
C5
C6
Ionisation current
Fan speed (value x 100)
Current fan control (PWM signal)
Relative power (percent of max. output)
Pump setting (PWM)
Difference between flow and set-point temperature
(max.30µA)
(µA)
(rpm)
(%)
(%)
(%)
(K)
•
•
•
•
•
•
•
•
•
•
•
•
Settings
d1
d2
d3
d4
d5
d6
Setting for two point or modulation control (PID)
Current boiler temperature set-point
Setting for room temperature
Setting for hot water temperature
Max. degree of modulation in heating mode
Max. fan speed at max. output in heating mode
(10-30
°
C)
(10-65
°
C)
(PHZ max.)
(NHZ max.)
(°C)
(°C)
(°C)
(°C)
(%)
(rpm)
•
•
•
•
•
•
•
•
•
•
•
•
Parameters (setting only for special functions or.
6
)
P0
P1
P2
P3
P4
P5
P6
Burner capacity (controller stop without potentiometer)
0 =min., 100 = max
Room/flow temperature setting (with/without potentiometer)
Setting for hot water temperature (without potentiometer)
Function not used
Min. pump speed for heating system (N
qmod
Min)
Steepness of heating curve
Parallel offset for heating curve
(0-100)
(10-30/20-85
°
C)
(10-65
°
C)
(10-100%)
(1-40)
(-31K…+31K)
(%)
20/55 (
°
C)
45 (
°
C)
--
28 (%)
25 (Value)
(Value)
•
•
•
•
•
•
•
*
*
*
*
*
*
*
Note: Other parameters displayed are not used.
1) Display * = Flashing,
•
= Illuminated, o = Not illuminated
2) Parameters in the group “A” can be selected by momentarily pressing the display mode button.
3) For error messages, see Table 11, or instructions for EUROCONTROL controls
4) Display flashes alternately
5) Internal BMU SW diagnostic code (POTTERTON Customer Service) selection of a few error codes
Code No.
Explanation
Remedy
295
Gas valve possible short Circuit to Earth
Check & eliminate (Internal BMU fuse faulty)
477
Parameter P1 (Table ?) > TkSNorm (Prog.No.505)
479
Parameter P1 (Table?) > TrSMax (Prog.No.502)
Adjustment error: Check settings & correct
425/426/427
STB_ too steep a temperature increase
433/435
STB_DELTA_T1, STB_DELTA_T£
(Delta-T too high for boiler flow & return)
Probably air in heating or hot-water system or no water circulation; bleed
boiler and heating system
531
Exit M5 is already used
Check Parameter 615
6) For boilers in delivery state or for heating curve setting for operation with heating circuit module HKM
Note: After 8 min. the display (15) automatically returns to the boiler temperature (A1).
