─ 18 ─
No.
Problem
Factor
Corrective action
6 Even though the
remote controller is
operated to change
the fan speed, the
fan speed does not
change.
The indoor negative pressure
setting or the indoor positive
pressure setting is set.
Check the function selection switches (SW2-4 and
SW2-5) on the circuit board or the function settings
(No. 6 and 7) of PZ-62DR-E.
(See the Lossnay Operating/Installation
Instructions or PZ-62DR-E Instruction Book.)
The external fan speed input is
set. (CN17)
When PZ-62DR-E is used, it displays the icon “
”.
Check the fan speed switching input (CN17).
The external fan speed input is
set. (CN26)
When PZ-62DR-E is used, it displays the icon “
”.
Check the function selection switches (SW5-6,
SW5-7, and SW5-8) on the circuit board or the
function setting (No. 66) of PZ-62DR-E.
(See the Lossnay Operating/Installation
Instructions or PZ-62DR-E Instruction Book.)
The system is operating in the
protective mode (intermittent
operation).
When PZ-62DR-E is used, it displays the icon “
”
that indicates the protective operation is in-progress.
For details, see the Lossnay Operating/Installation
Instructions or PZ-62DR-E Instruction Book.
Airflow setting is performed
with PZ-62DR-E.
Check the “Airflow” screen or the function settings
(No. 73 to 78, 87, and 88) of PZ-62DR-E.
(See the Lossnay Operating/Installation
Instructions or PZ-62DR-E Instruction Book.)
7 The fan operation is
unstable.
The motor rotation speed is
under control.
This product controls the motor by detecting the
motor rotation speed. The fan operation may be
unstable during rotation speed control (for maxi-
mum about 10 minutes).
8 Air volume is abnor-
mally large or small.
The model selection switch
(SW6) is not set correctly after
the circuit board is replaced.
Make the SW6 setting appropriate for the model.
( See Chapter 7. (9) Setting status record (page
47).)
9 The damper does
not operate even
though the trial
operation switch
(SW2-1) on the cir-
cuit board is turned
ON.
The connector between the
damper motor and circuit
board is disconnected.
Check the connection of the connector (CN12) on
the power circuit board.
Mechanical failure
Remove the rod of the damper board, and check
that the damper board can be moved by hand.
If the damper board cannot be moved, check for
obstacles that are obstructing the movement of the
damper board.
Damper motor failure
Remove the rod of the damper board and turn the
trial operation switch (SW2-1) ON.
The damper motor operates in about 30 seconds.
If the damper motor does not operate, replace the
damper motor (GM assembly).
Circuit board failure
Disconnect the connector (CN12) from the power
circuit board and check the voltage value between
the pins of CN12 when the trial operation switch
(SW2-1) is turned ON.
If there is no voltage value, replace the power cir-
cuit board.
If the problem persists, replace the damper motor
(GM assembly).
Poor connection of the con-
nectors (CN14, CN113)
Check the connector connections.
Control circuit board: CN14
Power circuit board: CN113
