Dungs MPA 5111 User Manual

15 … 68
14 … 68
Printed in Germany • Edition 02.14 • Nr. 254 722
7.6 State description
MPA 5111
State xx Designation Description
00 Error or initialisation The automatic control system is in the initialisation phase
(e.g. reference run of the stepped motor) or an error is ac-
tive.
If an error is active, the display shows an error message
and indicates the current fault (e.g. "F 11") instead of the
state number 00.
01 Waiting for heat request The automatic control system is ready for operation but
there is no heat request.
02 Adjustment parameter
record to stick
If the function parameter record stick (P10) is active, the
adapted parameter record is compared to the settings in
the MPA and, if necessary, the data are copied to the MPA
after a password has been entered. If necessary, the pass-
word must be entered via the display. For this, a small "c"
ashes.
03 Idle state control fan and stepped
motor
The system waits until the fan and the stepped motor are
in the OFF position If the fan has not completely stopped
after at least 2 minutes and/or the stepped motor has not
yet reached its position, the MPA is switched o and a re-
spective error message is displayed.
04 Idle state control LDW
(air pressure detector)
Depending on the operating mode of the air pressure de-
tector (P14), it is checked if the air pressure detector re-
ports "no air pressure"..
05 Watchdog loading phase The safety-related watchdog -circuit is activated.
06 Startup fan and stepped motor The system waits until the stepped motor has moved to its
nominal pre-aeration position and the fan has reached its
nominal pre-aeration speed.
Attention! The fan control does not check the feedback
of the fan!
07 Waiting for air pressure Depending on the operating mode of the air pressure de-
tector (P14), the system waits until the air pressure detec-
tor indicates the air pressure.
08 VPS A - Decision In this state the decision is made if a valve test during star-
tup must be carried out. See also section 7.3.2 Operation
with valve testing system. If no valve test must be carried
out, the state "Pre-aeration A" is activated.
This state lasts only 1/16 of a second.
09 VPS A - Empty the area between
the valves
V2 is opened (P42) in order to empty the area between
the valves and to compensate the possibly existing gas
pressure.
10 VPS A - Test time V1 In the dened test time (P43), no gas pressure may be built
up in the area between the valves otherwise the valve 1 is
considered as "leaking".
11 VPS A - Fill the area between the
valves
V1 is opened (P44) in order to ll the area between the
valves with gas pressure.
12 VPS A - Gas pressure detection This states lasts only one-eighth of a second and serves
for the monitoring of the gas pressure detector GDWVPS.
13 VPS A - Test time V2 The gas pressure may not drop within the dened test time
(P45) otherwise the valve 2 is considered as "leaking".
Note: When the MPA with ignition gas ame is used, also
the additional valve (= main gas ame) may be leaky al-
though the error message refers to V2.
14 Pre-aeration A This state provides a sucient pre-aeration. The dened
duration (P60) is observed for every startup.

Dungs MPA 5111 Specifications

General

Brand	Dungs
Model	MPA 5111
Category	Control Unit
Language	English