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Key to diagnosis codes
Code
Meaning
d.0
Part load setting
d.1
Water pump over run
d.2
Maximum burner anti cycling period at 20 °C
flow temperature
d.5
Flow temperature setting
d.8
External controls heat demand
d.10
Pump status
d.11
External pump status
d.13
External circulation pump
when fitted
d.14
Pump speed
d.16
2
nd
pump
d.22
Domestic hot water demand
d.23
Summer/Winter function (control knob)
d.24
Not applicable in GB
d.25
Hot–water activation
via warm–start clock
d.34
Current fan speed value
d.35
Diverter valve position
d.40
Actual flow temperature
d.41
Actual return temperature
d.44
Actual ionisation–current value
d.46
Outside–temperature correction
(only when VRC 410s is fitted)
d.47
Actual outside temperature
(only when VRC 410s is fitted)
d.60
Number over heat cut off operations
d.61
Number of lock outs
d.67
Remaining anti cycling period
d.68
No first start
d.69
No second start
d.71
Maximum target value for heating system
(factory–adjusted to 75 °C)
d.72
Pump over run (for loading warmstart)
factory–adjusted to 80 s
d.73
Offset warmstart temperature value
For solar applications: Switching difference
for the solar pump
d.80
Number of heating system operating hours
d.81
Number of hot water system operating hours
d.82
Number of heating system cycles (Total)
d.83
Number of hot water system cycles (Total)
Table 8.2 Diagnosis codes
Instructions for installation and servicing ecoMAX
Displayed/Adjustable values
Adjustable values in kW
1 – 60 min (factory–adjusted to 5 min)
2 – 60 min (factory–adjusted to 20 min)
Target value in °C
0 = room thermostat open (no demand)
1 = room thermostat closed (demand)
1 = ON
0 = OFF
1 = ON
0 = OFF
1 = ON
0 = OFF
Set value for built–in pump.
Factory setting: "auto"; possible adjustments:
0 = auto, 1 = 53%, 2 = 60%, 3 = 70%, 4 = 85%, 5 = 100%
1 = DHW circulating pump
2 = external CH pump
3 = vantage loading pump
4 = solar pump
1 = ON
0 = OFF
1 = Winter
0 = Summer
–
1 = yes
0 = no
Current value in rpm/10
0 = heating system
1 = hot water
2 = mid position
Current value in °C
Current value in °C
Current value /100 in μA
Correction value in K
Current value in °C
Number
Number of unsuccessful ignition operations at
last attempt
in min
Number of unsuccessful attempted 1
Number of unsuccessful attempted 2
Max. target value for heating–system flow temp. flow temperature
adjustable value 40–85 °C
Pump over run period, in seconds, after filling
of an electronically–controlled hot–water tank (incl.
Range: –15 K to +15 K
Factory–adjusted to –5 K (ecoMAX 800).
Recommended setting for solar applications: +7 °C
in h
in h
Troubleshooting 8
st
ignitions
nd
ignitions
33
33
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