─ 28 ─
Error
Code
LED1
(green)
LED2
(red)
Symptom
Cause
Corrective action
0900
Trial operation The trial operation switch (SW2-1)
on the circuit board is set to “ON”.
Check the trial operation switch.
(See the Lossnay Operating/
Installation Instructions or
PZ-62DR-E Instruction Book.)
3126
8
blinks
External
device error
When the terminals (TM3 [9] [10])
or Lossnay signal output terminal
PZ-4GS-E are set for pre-heater
output (the function setting No. 12
of PZ-62DR-E is set to “6”, and No.
13 to 16 are set to “5”), the following
conditions were satisfied.
• Outdoor air temperature detected
by OA thermistor stays at 70°C or
higher for one minute.
• Outdoor air temperature detected
by OA thermistor exceeds 15°C
within 15 minutes after the pre-
heater output starts.
• Outdoor air temperature is still
-10°C or lower 5 minutes after the
pre-heater output starts.
Causes of the above phenomenons
are described below.
See below.
The pre-heater is connected to the
wrong terminal.
Connect the pre-heater to the ter-
minals (TM3 [9] [10]).
(See the Lossnay Operating/
Installation Instructions or
PZ-62DR-E Instruction Book.)
Faulty connection of the pre-heater Check the pre-heater connections.
The output capacity of the pre-heater
is too large with respect to the air
volume of the Lossnay unit.
Adjust the output capacity of the
pre-heater. When the pre-heater is
used, run the Lossnay at a higher
fan speed.
The output capacity of the pre-heater
is too small with respect to the air
volume of the Lossnay unit.
Adjust the output capacity of the
pre-heater. When the pre-heater is
used, run the Lossnay at a lower
fan speed.
Pre-heater failure
Replace the pre-heater.
Pre-heater relay failure
Replace the relay for the pre-heater.
Circuit board failure
First, replace the control circuit
board.
If the problem persists, then
replace the power circuit board.
7 s
Error display example: Two blinks
0.25 s 0.25 s 0.25 s
ON
OFF
(4) Failure mode 4: Error code and LED display
An error code displayed on the remote controller (PZ-62DR-E, PZ-43SMF-E) or the M-NET controller, and
blinking or illumination of LED1 (green) or LED2 (red) on the circuit board show the type of an error.
The LED blink interval is 0.25 seconds for both on and off. The display duration is approximately 7 seconds.
Error display list