First EMV 110 502 Series, Manual

Page: 73 / 104

page
73
DTC 100/4 TD
Trouble-shooting guide
TROUBLE POSSIBLE FAILURE REMEDY
Thermostat inoperative Plug not connected Connect plug in socket
Water cools down during
night -Selector switch not in AUTO
position
-One of retaining valves
of the system inoperative
(enables thermosiohon water
circulation) -Set the switch to AUTO
position-Check machine
installation. We recommend
installation of motor actuated
ball valve “EMV110 800/230..”
When pumps are active,
unpleasant noise in
installation is heard Retaining valve makes noise
(weak spring) Replace nonreturn valve with
motor actuated ball valve
“EMV110 800/230..”
Irrespective of the
temperatures, all pumps
are inoperative Selector switch in position
“OFF”
Temperature limit of hot water
tank too low Set selector switch to AUTO
position Increase max.
temperature in hot water tank
(see: Temperature regulation
in hot water tank)
Irrespective of the temp.,
collector pump is
continuosly switched on
and after-heating pump is
inoperative Selector switch in “ON1”
position Set the switch to AUTO
position
Irrespective of the temp.,
after-heating pump is
continously switched on
and collector pump is
inoperative Selector switch in “ON2”
position Set selector switch to AUTO
position
Collector pump operates
normally and after heating
pump not After-heating circuit discon-
nected Connect after-heating circuit
See: Settings
After-heating pump
operates normally and
collector pump not Collector circuit disconnected Connect collector circuit
See: Settings
Control light of individual
pump is on, but the pump
is inoperative Pump blocked or cable of the
pump interrupted Check the pump and
connection to regulator
When “T1” key is pressed
Er1 appears T1 sensor is interrupted Check T1 sensor
When “T1” key is pressed
Er2 appears T1 sensor is short circuited Check T1 sensor
When “T2” key is pressed
Er1 appears T2 sensor is interrupted Check T2 sensor
When “T2” key is pressed
Er2 appears T2 sensor is short circuited Check T2 sensor
When “T3” key is pressed
Er1 appears T3 sensor is interrupted Check T3 sensor
When “T3” key is pressed
Er2 appears T3 sensor is short circuited Check T3 sensor
Er1 is shown on display T4 sensor is interrupted Check T4 sensor
Er2 is shown on display T4 sensor is short circuited Check T4 sensor