NEC PX-50XM4 series Service Manual page 251

Alarm of fan error

Blinking in green (intervals of
0.5seconds)
Turn off the main power supply.
Pressing the [MENU] key
of the product, turn on the
main power supply to
cancel alarming.
Is the fan running?
(Caution) When alarming is
canceled, [FAN MODE] of
FAN SET (P2/11) in the
factory adjustment menu
automatically moves from
[ENA] to [H], thus causing
the fan to run.
NO
Is there a voltage output of 11.3Vdc for PX-
42XM3/XR3, 11.2Vdc for PX-50XM4/XR4, and
9.3Vdc for PX-61XM3/XR3, respectively, at Pin
1 of the FA, FB, and FC connectors?
NO
Is there a voltage output of
11.3Vdc for PX-42XM3/XR3,
11.2Vdc for PX-50XM4/XR4, and
9.3Vdc for PX-61XM3/XR3,
respectively, when the FA
connector is disconnected and the
mains power is turned ON?
YES
The FAN-A is fault.
(Caution) In the FAN MODE, [ENA] is automatically recovered when the main power is turned OFF → ON.
Is there a 3.3Vdc output
YES
at Pin  of the FA and
FB, FC connectors?
YES
The FAN-A/FAN-B/FAN-C is fault.
Is there a voltage output of
11.3Vdc for PX-42XM3/XR3,
11.2Vdc for PX-50XM4/XR4, and
9.3Vdc for PX-61XM3/XR3,
respectively, when the FB
connector is disconnected and the
NO mains power is turned ON?
YES
The FAN-B is fault.
FAN SET
FAN MODE ENA CONT ENA
FAN OFF/L – CONT UP
FAN L/M – CONT TIME
FAN M/H – UP STEP
FAN SAVE 075 DOWN STEP
PLE SAVE 070 READ TIME
T ALM 095 TEMP LEVEL
RET TME 030
PLE TIME 001
T1 030 T2 025
T3 030 T4 – MODE 2
IC ERROR –
[MENU/ENTER] NEXT [EXIT] PREV
FAN SET
FAN MODE H CONT ENA
FAN OFF/L – CONT UP
FAN L/M – CONT TIME
FAN M/H – UP STEP
FAN SAVE 075 DOWN STEP
PLE SAVE 070 READ TIME
T ALM 095 TEMP LEVEL
RET TME 030
PLE TIME 001
T1 030 T2 025
T3 030 T4 – MODE 2
IC ERROR –
[MENU/ENTER] NEXT [EXIT] PREV
The fan is out of order on the
YES
side where a 3.3Vdc output
is generated.
NO
The MAIN PWB is fault.
(Caution) The FAN-C and FC
Is there a voltage output of
11.3Vdc for PX-42XM3/XR3,
11.2Vdc for PX-50XM4/XR4, and
9.3Vdc for PX-61XM3/XR3,
respectively, when the FC
connector is disconnected and the
NO
mains power is turned ON?
YES
The FAN-C is fault.
5-4
CONFIDENTIAL
–
–
–
2
2
60
1
2/11
–
–
–
2
2
60
1
2/11
connectors are used
only for the 61XM3
Series.
NO
The MAIN PWB
is fault.