Checking The Fan Unit; Power Supply Cord (120 Vac); Checking The Fan Unit; Tacho Cable - Buderus Logamax plus GB162-80 kW Service Instructions Manual

7 Actions
section 84 Checking the fan unit;
power supply cord (120 VAC)
H
DANGER OF FATAL ACCIDENT
A
due to electric shock!
DAMAGE TO THE INSTALLATION!
To prevent damage, do not insert the multimeter
measuring electrodes too far into the holes of the plug-
and-socket connection.
 Switch off the power supply to the heating system, see
section 72.
 Open the boiler door as instructed in section 73.
 Remove the UBA 3 burner automat as instructed in
section 82.
 Remove the cover from the connection tray, see section 114.
 Undo the fan unit power supply cord plug as instructed in
section 86, [1].
 Set the multimeter to "Measure resistance" [1].
 Check the power supply cord of the fan unit for breaks. The
electrical resistance measured separately for every wire must
Ω
be approx. 0 [2]. Measure between the plug and the black
contacts (high-voltage connector pins 9, 10 and 11) on the
UBA 3 mounting base [3].
 Check the power supply cord of the fan unit for internal short
circuiting. The electrical resistance, measured between two
random wires, must be infinite. See also section 131.
 Remove the multimeter.
 Connect the fan unit power supply plug in reverse order.
 Install the UBA 3 burner automat in reverse order of removal.
 Install the lid on the connection tray in reverse order.
 Close the boiler door as instructed in section 77.
 Switch on the power supply to the heating system, see
section 79.
62
81-pin low-voltage connector
16-pin high-voltage connector
3
2
1
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
section 85 Checking the fan unit;
tacho cable
H
DANGER OF FATAL ACCIDENT
A
due to electric shock!
DAMAGE TO THE INSTALLATION!
To prevent damage, do not insert the multimeter
measuring electrodes too far into the holes of the plug-
and-socket connection.
 Switch off the power supply to the heating system, see
section 72.
 Open the boiler door as instructed in section 73.
 Remove the UBA 3 as instructed in section 82.
 Remove the cover from the connection tray, see section 114.
 Remove the tacho cable plug, see section 86, [2].
 Set the multimeter to "Measure resistance" [1].
 Connect the multimeter.
 Check the fan unit tacho cable for breaks. The electrical
resistance measured separately for every wire must be
Ω
approx. 0 [2]. Measure between the plug and the black
contacts (low-voltage connector pins 16, 17, 44 and 45) on
the UBA 3 mounting base [3].
 Check the fan unit tacho cable for internal short circuiting.
The electrical resistance, measured between two random
wires, must be infinite. See also section 131.
 Remove the multimeter.
 Connect the tacho cable plug in reverse order.
 Install the UBA 3 in reverse order of removal.
 Install the lid on the connection tray in reverse order.
 Close the boiler door as instructed in section 77.
 Switch on the power supply to the heating system, see
section 79.
81-pin low-voltage connector
16-pin high-voltage connector
3
2
1