Buderus Logano plus GB312 Installation Manual page 84

10
Troubleshooting
Type Display
1)
code Fault code Cause
V CY 566
V CY 567
V CO 568
V CO 569
Tab. 17 Fault messages
1) V = locking; B = inhibiting; BC = operating code
84
Description
Return temperature Control unit is
receiving implausi-
< 23 °F (< -5 °C) (cir-
ble signals from
cuit break)
return sensor.
Return temperature Control unit is
receiving implausi-
> 266 °F (> 130 °C)
ble signals from
(short circuit)
return sensor.
Water pressure sen- Water pressure
sor fault (break in sensor circuit break
cable). (voltage > 3.5 V)
Water pressure sen- Water pressure
sor fault (short circuit). sensor short circuit
(voltage < 0.5 V).
Logano plus GB312 - Technical specifications are subject to change without prior notice
Testing
sequence/Cause Action
Check connecting Replace connect-
lead between SAFe ing lead if neces-
and return sensor. sary.
Check electrical Rectify any contact
connection of con- problems.
necting lead to
Replace tempera-
SAFe.
ture sensor if nec-
Check resistance essary.
levels of tempera-
If temperature sen-
ture sensor against
sor resistances are
table.
correct but volt-
Check voltage at ages incorrect,
temperature sensor replace SAFe.
terminals on SAFe
against table.
Check connecting Replace connect-
lead between SAFe ing lead if neces-
and return sensor. sary.
Check electrical Rectify any contact
connection of con- problems.
necting lead to
Replace tempera-
SAFe.
ture sensor if nec-
Check resistance essary.
levels of tempera-
If temperature sen-
ture sensor against
sor resistances are
table.
correct but volt-
Check voltage at ages incorrect,
temperature sensor replace SAFe.
terminals on SAFe
against table.
Check connection Establish good
between SAFe and electrical contact.
water pressure sen- Replace lead if nec-
sor for poor con- essary.
tact, breaks and
damage.
Check water pres- Replace water
sure sensor. pressure sensor.
Check connecting Rectify any short
lead to water pres- circuits.
sure sensor.
Replace water
Check water pres- pressure sensor.
sure sensor.