IVT 09LR-N Service Manual page 24

12LRN
Function
10 AC overcurrent error Indoor and outdoor units stop if out-
in compressor OFF door AC current exceeds about 3 A
status while compressor is in non-opera-
tion status.
11 AC maximum current Compressor stops if coutdoor AC
error current exceeds 17 A.
12 AC current defi- Compressor stops if operating fre-
ciency error quency is 50 Hz or higher and out-
door AC current is about 2.0 A or
lower.
13 Thermistor installa- Compressor stops if high and low
tion error or 4-way values of temperatures detected by
valve error outdoor unit heat exchanger ther-
mistor (TH2) and 2-way valve ther-
mistor (TH5) do not match
operating cycle.
14 Compressor high Compressor stops if compressor
temperature error chamber thermistor (TH1) exceeds
about 114C, or if there is short-cir-
cuit in TH1.
15 Outdoor unit heat Compressor stops if there is short-
exchanger thermistor circuit in outdoor unit heat
short-circuit error exchanger thermistor (TH2).
16 Outdoor unit outside Compressor stops if there is short-
air temperature ther- circuit in outdoor unit outside air
mistor short-circuit temperature thermistor (TH3).
error
17 Outdoor unit suction Compressor stops if there is short-
thermistor short-cir- circuit in outdoor unit suction ther-
cuit error mistor (TH4).
18 Outdoor unit 2-way Compressor stops if there is short-
valve thermistor circuit in outdoor unit 2-way valve
short-circuit error thermistor (TH5).
19 Outdoor unit heat Compressor stops if there is open-
exchanger thermistor circuit in outdoor unit heat
open-circuit error exchanger thermistor (TH2).
20 Outdoor unit outside Compressor stops if there is open-
air temperature ther- circuit in outdoor unit outside air
mistor open-circuit temperature thermistor (TH3).
error
21 Outdoor unit suction Compressor stops if there is open-
thermistor open-cir- circuit in outdoor unit suction ther-
cuit error mistor (TH4).
22 Outdoor unit 2-way Compressor stops if there is open-
valve thermistor circuit in outdoor unit 2-way valve
open-circuit error thermistor (TH5).
23 Outdoor unit dis- Compressor stops if there is open-
charge thermistor circuit in outdoor unit discharge
open-circuit error thermistor (TH1).
24 Serial signal error Compressor stops if outdoor unit
cannot receive serial signal from
indoor unit for 30 seconds.
25 Compressor startup Compressor stops if compressor
error fails to start up.
26 Compressor rotation Compressor stops if there is no
error (at 120 ener- input of position detection signal
gizing) from compressor or input is abnor-
mal.
27 Outdoor unit DC fan Operation stops if there is no input
error of rotation pulse signal from out-
door unit fan motor for 30 seconds.
28 PAM overvoltage Compressor stops if DC voltage is
error 400 V or higher.
Operation
Description Detection period
When compressor is in
non-operation
When compressor is in
operation
When compressor is in
operation
3 minutes after com-
pressor startup
When in operation
At compressor startup Operation OFF or ON Yes ✩1
At compressor startup Operation OFF or ON Yes ✩1
At compressor startup Operation OFF or ON Yes ✩1
At compressor startup Operation OFF or ON Yes ✩1
At compressor startup Operation OFF or ON Yes ✩1
At compressor startup Operation OFF or ON Yes ✩1
At compressor startup Operation OFF or ON Yes ✩1
At compressor startup Operation OFF or ON Yes ✩1
At compressor startup Operation OFF or ON Yes ✩1
When in operation
At compressor startup Operation OFF or ON Yes ✩3
Compressor operating
at 120 energizing
When outdoor unit fan
is in operation
When in operation
Reset condition
Replacement of defec-
tive parts such as IPM
Operation OFF or ON Yes ✩1
Operation OFF or ON Yes ✩1
Operation OFF or ON Yes ✩1
Operation OFF or ON Yes ✩1
Reset after reception of
serial signal
Operation OFF or ON Yes ✩3
Operation OFF or ON Yes ✩1
Operation OFF or ON Yes ✩1
3 – 2
Self-diagnosis result
display
Indoor Indoor Outdoor
unit error unit unit
display
Yes ✩2
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
None None None
Yes Yes
Yes Yes
Yes Yes
Yes Yes