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9-6. FUNCTIONS OF JUMPER WIRE
Each function is controlled by the jumper wire on control p.c. board. For service parts, J11- J15 and J21-J24, DIP switches
(SW1 and SW2) are equipped with jumper wire.
Jumper wire
Functions
J11~J15
Model
(SW1)
settings
Capacity
J21~J24
settings
(SW2)
9-7. HOW TO CHECK THE PARTS
Parts name
Room temperature
Disconnect the connector then measure the resistance using a tester.
thermistor
(TH1)
(Surrounding temperature 10:~30:)
Pipe temperature
thermistor
(TH2)
Condenser/Evaporator
temperature thermistor
(TH5)
<Thermistor Characteristic graph>
Thermistor for
lower temperature
Thermistor R
=15k" ± 3%
0
Fixed number of B=3480k" ± 2%
Rt=15exp { 3480(
273+t
0:
15k"
10:
9.6k"
20:
6.3k"
25:
5.2k"
30:
4.3k"
40:
3.0k"
50
Open/short of jumper wire
Models : PEAD-RP1.6~6
J11 J12 J13 J14 J15
Heater-less
Models
J21 J22 J23 J24
RP1.6
RP2
RP2.5
RP3
RP4
RP5
RP6
Normal
4.3k"~9.6k"
Open or short
Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)
1
1
) }
273
(Marks in the table below)
Check points
Abnormal
(Refer to the thermistor)
Jumper wire (
: Short
DIP switch
(
: ON
Remarks
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0
10 20 30 40 50
Temperature (:)
: Open)
: OFF)
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