IVT 12KHR-N Service Manual page 24

12KHR-N
Function
9 AC overcurrent Operating frequency lowers if out-
error door AC current exceeds peak
control current value. outdoor
stops if compressor AC current
exceeds peak control current
value at minimum frequency.
10 AC overcurrent Indoor and outdoor units stop if
error in compressor outdoor AC current exceeds
OFF status about 3 A while compressor is in
non-operation status.
11 AC maximum cur- Compressor stops if coutdoor AC
rent error current exceeds 17 A.
12 AC current defi- Compressor stops if operating
ciency error frequency is 50 Hz or higher and
outdoor 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
valve error by outdoor unit heat exchanger
thermistor (TH2) and 2-way valve
thermistor (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-circuit in TH1.
15 Outdoor unit heat Compressor stops if there is
exchanger ther- short-circuit in outdoor unit heat
mistor short-circuit exchanger thermistor (TH2).
error
16 Outdoor unit outside Compressor stops if there is
air temperature short-circuit in outdoor unit out-
thermistor short-cir- side air temperature thermistor
cuit error (TH3).
17 Outdoor unit suction Compressor stops if there is
thermistor short-cir- short-circuit in outdoor unit suc-
cuit error tion thermistor (TH4).
18 Outdoor unit 2-way Compressor stops if there is
valve thermistor short-circuit in outdoor unit 2-way
short-circuit error valve thermistor (TH5).
19 Outdoor unit heat Compressor stops if there is
exchanger ther- open-circuit in outdoor unit heat
mistor open-circuit exchanger thermistor (TH2).
error
20 Outdoor unit outside Compressor stops if there is
air temperature open-circuit in outdoor unit out-
thermistor open-cir- side air temperature thermistor
cuit error (TH3).
21 Outdoor unit suction Compressor stops if there is
thermistor open-cir- open-circuit in outdoor unit suc-
cuit error tion thermistor (TH4).
22 Outdoor unit 2-way Compressor stops if there is
valve thermistor open-circuit in outdoor unit 2-way
open-circuit error valve thermistor (TH5).
23 Outdoor unit dis- Compressor stops if there is
charge thermistor open-circuit in outdoor unit dis-
open-circuit error charge thermistor (TH1).
24 Serial signal error Compressor stops if outdoor unit
cannot receive serial signal from
indoor unit for 30 seconds.
25 Compressor star- Compressor stops if compressor
tup error fails to start up.
Description Detection period
When compressor is
in operation
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 star-
tup
At compressor star-
tup
At compressor star-
tup
At compressor star-
tup
At compressor star-
tup
At compressor star-
tup
At compressor star-
tup
At compressor star-
tup
At compressor star-
tup
When in operation
At compressor star-
tup
Operation
Reset condition
Operation OFF or ON Yes $1
Replacement of
defective 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
Operation OFF or ON Yes $1
Operation OFF or ON Yes $1
Operation OFF or ON Yes $1
Operation OFF or ON Yes $1
Operation OFF or ON Yes $1
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
3 – 2
Self-diagnosis
result display
Indoor Indoor Outdoor
unit unit unit
error
display
Yes Yes
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