Error History - Burner Control Phase - andrews MAXXflo EVO CWH 30/201 Operating Instructions Manual

4.3 ERROR HISTORY - BuRNER CONTROL PHASE

Phase Phase Phase
No: display
reference
code
1 TNB Homerun
2 TLO Homerun
3 TNN Homerun
4 STY Standby
5 STV Standby
6 THL1 Startup
7 THL1A Startup
8 TV Startup
9 TBRE Startup
10 TW1 Startup
11 TW2 Startup
12 TVZ Startup
13 TSA1 Safety time
14 TSA2 Safety time
15 TI Operation
16 MOD Operation
17 THL2 Shutdown
18 THL2A Shutdown
19 TN1 Shutdown
20 SAF Error
21 STOE Error
22 TNA Shutdown
23 KT Standby
24 TN2 Shutdown
Engineer
Phase description Explanation
Permitted afterburn Not relevant for the MAXXflo EVO
time
Permitted time with fan Time after post purge when the air flap is still open as the fan
speed speed runs down
Permitted time with fan Time after post purge when the fan is permitted to run on
speed
No demand No heat demand, burner is not active
Start prevention Burner held until a temporary condition has been removed (e.g.
B2 sensor disconnected)
Fan ramp-up time to Maximum fan ramp-up time for fan to reach pre-purge speed
ignition speed
Fan ramp-up time to Maximum fan ramp-up time for fan to reach ignition speed
ignition speed
Pre-purging Fan pre-purging phase
Fan adjustment Maximum time required to reach ignition level after pre-purging
Waiting time Maximum waiting time until the following functions complete:
- Internal safety tests
- Fan speed adjustment to ignition load
Waiting time Fan speed adjustment to ignition load
Pre-ignition phase Time before ignition (minimum 0.2 seconds)
1st safety time First part of safety time with spark on and gas valve open
2nd safety time Second part of safety time with spark off and gas valve open
Interval Stabilisation of flame (5 seconds)
Control mode Burner is modulating normally - Main phase of operation
Post purging Post purging at last operating fan speed - Demand has been
turned off, gas valve will be closed
Post purging Post purging at pre-purge fan speed - Demand has been turned
off, gas valve will be closed.
Post purging Post purging at last operating fan speed - Demand has been
turned off, gas valve will be closed
Boiler error state Certain types of error can force the heater control to jump to this
phase and all safety related outputs are deactivated. When the
condition returns to normal, this phase will be skipped and the
control will restart. This will avoid lockout and the need to reset.
Boiler error state If the heater controls detect a system error that would drive the
heater into an unsafe state (i.e. lockout), the heater controls will
jump to this phase. Only an applied reset can resume operation.
Post purging at pre- Last phase of fan post purge before the boiler controls go to
purge speed standby phase.
Start prevention Temporary start prevention condition becomes a permanent con-
dition after a period of time has elapsed.
Interruptable post Interruptible post purging at last fan operation speed. If there is a
purging new heat demand during the post purge period, post purging can
immediately be interrupted.
35 MAXXflo EVO