52
Error shows when safety circuit is open. R
emo
ve
J13 connector from
control module. Check for continuity between two pins connected to two pink wires, is continuity a
vailable?
YES
NO
Replace Control Module
Boiler
fi
red without enough w
ater
fl
ow
through heat ex
changer
. Heat ex
changer
is o
ver heated. Either high limit or heat
ex
changer temper
ature switch is open.
Check the following:
•
Air in system?
• Verify
water
fl
ow in system piping
•
Flush system if water is dirty.
Is boiler supply pipe (abo
ve
heat ex
changer) hot?
W
ait for boiler to cool down.
YES
NO
Replace Brok
en S
witch
Unplug molex connector on supply
temper
ature sensor
. Check continuity
between two pins on sensor two pins connected to two pink wires before remo
ving the connector
.
Is continuity a
vailable?
YES
NO
Check for loose connections
on two pink wires on J13
connector
, supply sensor
, and
safety temper
ature switch.
YES
NO
Fix Loose Connections
Replace Wire Harness
Let all z
ones
run until w
ater
temper
ature
drops.
Is Heat Ex
changer surface hot?
YES
NO
Check high limit
and surface temper
ature
switches
13 - TROUBLE SHOOTING
Содержание DKVLT-050
Страница 47: ...47 13 TROUBLE SHOOTING ...
Страница 51: ...51 13 TROUBLE SHOOTING ...
Страница 53: ...53 13 TROUBLE SHOOTING ...
Страница 62: ...62 Supply Water Temperature Sensor Resistance Chart 13 TROUBLE SHOOTING ...
Страница 64: ...64 14 WIRING DIAGRAM 14 1 Connection Diagram 050 075 100 150 200 MBH ...
Страница 66: ...66 14 WIRING DIAGRAM 14 3 Connection Diagram 299 MBH EXTERNAL PUMP RELAY LIMIT OF 1 AMP PER PUMP SEE SECTION 8 ...
Страница 83: ...83 NOTES ...
Страница 84: ...ECR International Inc 2201 Dwyer Avenue Utica NY 13501 web site www ecrinternational com ...