1. Manuals
  2. Brands
  3. IVT Manuals
  4. Heat Pump
  5. 09LR-N
  6. Service manual

IVT 09LR-N Service Manual page 32

Split type air to air heat pump
Hide thumbs
Table of Contents

Advertisement

12LRN
5. IPM check method
Turn off the power, let the large capacity electrolytic capacitor (C10) discharge completely, and dismount the IPM. Then, using a tester, check leak
current between C and E.
When using a digital tester, the (+) and (-) tester lead wires in the table must be reversed.
Needle-type tester
Normal resistance value
(-)
(+)
P
N
(several M)
U
V
W
6. DC Over Current Error ( 6-0 error)
6-0 error memory is
recorded.
START
Are valves(2-way
Yes
and 3-way) close?
No
Fullyopenstop valves
Does compressor
rotate?
* 1
Check IPM
abnormal
lead wire.
n
r o
m
l a
Modify the connection of
compressor lead wire on PWB.
* 2
Check
abnormal
short circuit.
normal
* 3
Check compressor
abnormal
terminal.
normal
Modify compressor terminal
Replace PWB
Does compressor
rotate?
Replace Compressor
Does compressor rotate
more than 30 seconds?
Is IPM PWB floating
from the heat sink?
Check the AC power
supply voltage when
compressor rotate.
(rated voltage±10%)
Replace PWB.
Cooling mode?
*
4
marking.
Check indoor
exchanger termistor and
discharge thermistor.
Check indoor
heat exchanger.
Check the refrigerant amount.
Check the discharge pressure.
Check the installation condition.
Needle-type tester
(-)
(+)
U
N
V
W
Values in ( ) are for digital tester.
* 1
Check the connection of compressor lead wire on PWB.
TU : RED
TV : WHITE
TW : ORANGE
* 2
Refer to "IPM CHECK METHOD".
* 3
Check the connection of compressor terminal marking.
Refer to " DISASSEMBLING PROCEDURE OUTDOOR UNIT".
* 4
Check to make sure thermistors are installed in correct portions.
Refer to "THERMISTOR TEMPERATURE CHARACTERISTICS".
Yes
No
Fix IPM PWB with screws securely.
a
b
n
r o
m
l a
Connect stable power supply.
normal
Yes
No
H
e
t a
n i
g
m
o
d
e
a
b
n
r o
m
l a
n
r o
m
l a
Modify or replace termistor.
a
b
n
r o
m
l a
n
r o
m
l a
Clean indoor heat exchanger.
3 – 10
Normal resistance value
(several M)
C
o
l o
n i
g
m
o
d
e
*
4
Check outdoor
a
b
n
r o
exchanger termistor and
discharge thermistor.
n
r o
m
l a
Modify or replace termistor.
a
b
n
r o
Check outdoor
heat exchanger.
n
r o
m
l a
Clean indoor heat exchanger.
m
l a
m
l a
Show Quick Links

Hide quick links:

Advertisement

Table of Contents
loading

Related Manuals for IVT 09LR-N

Related Products for IVT 09LR-N

This manual is also suitable for:

12lr-n

Table of Contents