Mitsubishi Electric Lossnay LGH-50RVS-E Handbook page 17

No. Problem
3 [When wall-mounted
type CO sensor
2
PZ-70CSW-E is
used]
The LED display
lamps of the CO
2
sensor do not
light even though
the trial operation
switch (SW2-1) on
the Lossnay circuit
board is turned ON.
4 [When wall-mounted
type CO sensor
2
PZ-70CSW-E is
used]
CO concentra-
2
tion display of
PZ-62DR-E does
not change even
though the number
of persons in a room
is changed.
5 The fan does not
stop even though
the remote control-
ler is operated to
stop operation.
Factor
CO sensor setting is set
2
incorrectly.
The connectors between the
LED circuit board (of the CO
sensor) and control circuit
board (of the Lossnay unit) are
disconnected.
The lead wires connecting the
LED circuit board (of the CO
sensor) and control circuit
board (of the Lossnay unit) are
broken.
LED circuit board failure
Ventilation air volume by the
Lossnay unit is large enough or
too small against the change in
the number of persons in a room.
The lead wires connecting the
CO sensor circuit board and
2
Lossnay control circuit board
are broken.
The lead wires connecting the
LED circuit board (of the CO
sensor) and control circuit
board (of the Lossnay unit) are
broken.
The pre-heater or operation
monitor with delay operation is
set to be used.
Check the setting.
• When the function setting (No. 66) of PZ-62DR-E
is set to "0", the function selection switches
(SW5-6 to SW5-8) on the Lossnay circuit board
should be: SW5-6 ON, SW5-7 OFF, SW5-8 OFF
• When the function setting (No. 66) of PZ-62DR-E
is set to other than "0", set it to "5".
Check the connector connections.
LED circuit board: CN100
2
Control circuit board: CN34
For details about the CO
see its Installation and Instruction Manual.
Measure the voltage between the pins of connec-
tor (CN100) with the trial operation switch (SW2-1)
2
ON. When the values shown below are detected,
the lead wires are not broken.
• Between the pins 1 and 2 of CN100, voltage is
applied in a cycle of 20-second 0 V and 10-sec-
ond 12 V DC.
• Between the pins 1 and 3 of CN100, voltage is
applied in a cycle of 20-second 0 V and 10-sec-
ond 12 V DC.
• Between the pins 1 and 4 of CN100, voltage is
applied in a cycle of 20-second 0 V and 10-sec-
ond 12 V DC.
When extending the CO
check that they are properly connected.
For details about the CO
see its Installation and Instruction Manual.
If the problem persists, replace the wall-mounted
type CO sensor. For details about the CO
2
PZ-70CSW-E, see its Installation and Instruction Manual.
In this case, CO
may be always low or high.
If the lead wire to pin 3 of the connector on the CO
sensor circuit board is broken, detected CO
centration value may be fixed.
When extending the CO
check that they are properly connected.
For details about the CO
see its Installation and Instruction Manual.
Check the connector connections.
LED circuit board: CN100
2
Control circuit board: CN34
When extending the CO
check that they are properly connected.
For details about the CO
see its Installation and Instruction Manual.
If the pre-heater or operation monitor with delay
operation is set to be used, the fan continues oper-
ating for three minutes after the stop operation.
Check the function settings (No. 12 to 16) of
PZ-62DR-E. (See the Lossnay Operating/Installation
Instructions or PZ-62DR-E Instruction Book.)
─ 17 ─
Corrective action
sensor PZ-70CSW-E,
2
sensor wiring cables,
2
sensor PZ-70CSW-E,
2
concentration displayed value
2
sensor wiring cables,
2
sensor PZ-70CSW-E,
2
sensor wiring cables,
2
sensor PZ-70CSW-E,
2
sensor
2
2
con-
2