5
No.
Supply air fan periodical-
ly stops operating.
«
When the outdoor air temperature is 14°F or
less, operation stops after a fixed period of
about 10 minutes to keep the Lossnay Core
from freezing. (Cold weather area spec)
«
When connected to a Mr. Slim or a City Multi
by a duct, operation stops when the air condi-
tioner is defrosting.
«
This is no error.
«
This is no error.
6
Takes in air from out-
doors during interlocked
operation with a Mr. Slim
or a City Multi, but supply
air fan doesn’t stop oper-
ating when defrosting.
«
The indoor unit’s outside air intake selection is
invalid.
«
Set the outdoor air intake selec-
tion of a indoor unit to “ON.”
7
The supply air fan and
exhaust fan both periodi-
cally stop operating.
«
When connected to Mr. Slim or City Multi by a
duct and the function select switch (SW 5-3) on
the Lossnay circuit board is ON, operation
stops when the air conditioner is defrosting.
«
Check the function select switch
(SW5-3).
8
Fan speed will not
change.
«
The High/Low switching extermary input
(CN16) is set to ON.
«
The function select switch (SW2-4.5) on the Lossnay cir-
cuit board is set to the high fixed or low fixed fan speed.
«
The trial operation switch (SW2-1) is turned
ON.
«
Check the High/Low change
input (CN16).
«
Check the function select switch
(SW2-4,5).
«
Check the trial operation switch
(SW2-1).
9
Damper board does not
operate.
«
The outside air temperature is less than 46.4°F.
«
The damper board operation is defective.
«
The thermistor related connectors are not
securely connected.
«
The damper related connectors are not secure-
ly connected.
«
The trial operation switch (SW2-1 or SW2-3) is
turned ON.
«
When using the remote controller to change
ventilation mode, there may be a delayed start
of up to 30 seconds depending on the timing.
«
Check the outdoor air temperature.
«
Remove the load and check or
move the damper board by hand.
«
Check the connections of the
lead wire connectors and the cir-
cuit connectors.
«
Check the connections of the
lead wire connectors and the
control circuit connectors.
«
Check the trial operation switch
(SW2-1 or SW2-3).
«
This is no error.
10
Operation monitor output
is late with regard to exter-
nal control input ON/OFF.
«
When using the PZ-41SLB-E there is a maxi-
mum delay of 7 seconds, or without using
there is a maximum delay of 3 seconds.
«
This is no error.
11
Operation monitor output
is OFF during operation.
«
When the function select switch (SW 5-2) on
the Lossnay circuit board is ON, for operation
monitor output for interlocked operation with
the supply air fan, it turns OFF when the out-
side air is 14°F or less or when the air condi-
tioner is defrosting.
«
Check the function select switch
(SW5-2).
12
Delayed start operation
does not work when
Delayed start is set.
«
When using the PZ-41SLB-E, the circuit func-
tion select switch is set for delayed start.
«
Set delayed start at the remote con-
troller (the circuit board switch is not in
effect when using the PZ-41SLB-E).
13
Lossnay does not operate when
power is on even when the
power on/off setting is made.
«
Using the PZ-41SLB-E.
«
The power supply ON/OFF set-
ting is not in effect when using
PZ-41SLB-E.
14
Interlocked operation is
different from the set-
tings.
«
When using the PZ-41SLB-E, the circuit func-
tion select switch is set for interlocked opera-
tion.
«
Set interlocked operation at the
remote controller (the circuit
board switch is not in effect when
using the PZ-41SLB-E).
Symptom
Cause
Corrective action
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