Rectify interference
6 720 643 196 (2010/02)
22
11. Is a ceramic power resistor connected to
relay X52 on the inverter circuit board?
yes: The resistor should have 16 ohm, replace if neces-
sary. Didn’t that help? Æ 12
no: The resistance must be 16 ohm.
B Connect the resistor to X52.
Didn’t that help? Æ 12
12. Are the condensers connected to the
inverter circuit board?
IMPORTANT! The condensers may have
voltage left even if the machine is
switched off.
yes: Are the condensers connected to TB-P2, TB-C1 and
TB-N1.
B Compare the connection with the wiring diagram,
correct if necessary.
Didn’t that help? Æ 13
no: B Connect the condensers on TB-P2, TB-C1 and TB-
N1.
Didn’t that help? Æ 13
13. Is (TB-N1)--(TB-P2) => 450-680VDC.
Is (TB-N1)--(TB-C1) => 225-340VDC.
Is (TB-C1)--(TB-P2) => 225-340VDC.
yes: Æ 14
no: Didn’t that help? Æ 14
14. B Check the wiring between the inverter
circuit board and compressor.
Terminal block on inverter circuit board -
> Cable colour -> Terminal block on com-
pressor. TB-U -> black -> U TB-V -> brown
-> V TB-W -> grey -> W
yes: Æ 15
no: B Replace wiring if burnt.
If the compressor does not run and the wiring is
incorrectly installed, the compressor is probably bro-
ken.
15. Is the voltage between (TB-U)--(TB-V),
(TB-V)--(TB-W) and (TB-W)--(TB-U)?
yes: Æ 16
no: Inverter circuit board defective.
B Replace inverter circuit board.
Didn’t that help? Æ 16
16. If a specific alarm code appears in the
rego window, see separate fault tracing
tree.
The heat pump does not run, troubleshooting the inverter section
Check Action
Tab. 20
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