Correct connector.
Sensor error
→
Replace.
Check outdoor P.C.B. MCC-
1665
.
Defect
→
Replace.
Is connection of CN604
on P.C.B MCC-
1665
correct?
Is resistance value of TGa sensor correct?
Is connection of CN605
on P.C.B MCC-
1665
correct?
Is resistance value of TGb sensor correct?
Is connection of CN606
on P.C.B MCC-
1665
correct?
Is resistance value of TGc sensor correct?
Correct connector.
Sensor error
→
Replace.
Check outdoor P.C.B. MCC-
1665
.
Defect
→
Replace.
Correct connector.
Sensor error
→
Replace.
Check outdoor P.C.B. MCC-
1665
.
Defect
→
Replace.
YES
NO
YES
NO
YES
NO
Check
code
[1C]
(Continued)
Outdoor
LED display
z
zz
{
*
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
[A room gas side temp. sensor (TGa) error]
[B room gas side temp. sensor (TGb) error]
[C room gas side temp. sensor (TGc) error]
{
:ON
(
{
*:3 sec ON / 0.5 sec OFF)
z
:OFF
*
z
z
{
*
*
z
{
*
YES
NO
[Communication error
b
etween MCUs]
Are connections of CN802 on P.C.B MCC-
1665
and CN806 on P.C.B MCC-1645 correct?
Correct connection.
Check outdoor P.C. Boards.
Defect
→
Replace.
*
z
*
z
Is AC mains voltage correct?
(198 to 264V)
Is wire connection correct?
Compressor lead
(Board side, Compressor Side),
Reactor lead, Power supply lead.
Check wiring construction.
Ask repair of power supply.
Check wire connection
and correct it.
Check outdoor P.C.B MCC-
1665
.
Defect
→
Replace.
Is compressor under correct condition?
Check outdoor P.C.B MCC-1
645
.
Defect
→
Replace.
Is there refrigerant stagnation?
Compressor lock
→
Replace.
Does PMV correctly operate?
Check TE, TS sensors and PMV.
Detect
→
Replace.
NO
NO
YES
YES
NO
YES
YES
NO
NO
YES
[1D]
[Compressor lock]
z
{
*
FILE NO. SVM-18020
- 97 -
