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State of Machine
Cause Check point Content of confirmation
4) The control printing wiring board setting
is defective.
3) Connected mistake
3) Connected mistake
2) Output wiring supply reverse-phase.
1) Power supply reverse-phase.
2) Power supply reverse-phase.
Output wiring reverse-phase.
The phase of fan motor output wiring is
confirmed. (TB OUT)
The phase of fan motor output wiring is
confirmed. (TB OUT)
The phase of input voltage is confirmed.
(TB IN)
The phase of input voltage is confirmed.
(TB IN)
The set of dip switch is confirmed. (SW0-3)
(P2)
It is confirmed that the switch setting is
corresponding to the electric wiring diagram.
The control substrate is matched to setting the
electric wiring diagram.
The fan controller connection is confirmed.
The fan controller connection is confirmed.
The input voltage is confirmed. (CN04)
Is the phase of U, V, W correct?
Is the phase of L1, L2, L3 correct?
Is the phase of U, V, W correct?
Is the phase of L1, L2, L3 correct?
Troubleshooting
The phase of U, V, W is corrected.
The connected phase is confirmed.
The wiring mistake is corrected.
The phase of L1, L2,L3 is corrected.
The phase of U, V, W is corrected.
The phase of L1, L2,L3 is corrected.
NF-SCRM-TB OUT (The connection phase
is noted.)
CNU, CNV, CNW-SCRM
(The connection is noted.)
Is not AC198-264V input in CN04?
TB IN-NF wiring (The connection phase is noted.)
2. The fan rotates
oppositely.
3. The rotation speed
of fans cannot control.
Something wrong
occurs by step2-2 drive
confirmation of installed
confirmation matter.
It becomes high-
pressure abnormal
pressure.
1) During heating drive During heating drive, there is an input in CN04 and
the fan becomes full load drive. Normality
CN04- the wiring for full load input in heating
(CN04 input is AC198-264V in heating.)
There must not be connector connection in
CNX.
(CNX is compulsion full load input.
Full load when short-circuited.)
NF-SCRM-TB OUT (The connection phase is
noted.)
CNU, CNV, CNW-SCRM
(The connection is noted.)
TB IN-NF wiring (The connection phase is
noted.)
TB IN-T01-CN02 (The connection phase is
noted.)
CN02- thermistor
The connected phase is confirmed.
The wiring mistake is corrected.
In cooling, when there is an input in CN04, wiring
of CN04 is mistake connection.
The wiring is corrected.
When there is an input in CN04, the fan is full load..
When there is a connector connection in CNX,
it is removed.
The unit side connection is confirmed.
The connected phase is confirmed.
The wiring mistake is corrected.
TB OUT - fan motor
(The phase (U, V, W) is noted.)
Position of the wiring for full load input
(In heating)
Installation position of thermistor
If the position where the thermistor is installed is
wrong, the rotation speed control of the fan as
condensing temperature is impossible.
5) The thyristor module (SCRM) is defective. The content of P14 is checked. (SCRM) The content of P14 is judgment. (SCRM) SCRM exchange when abnormality is found.