Toshiba MMU-UP0051MH-E(TR) Service Manual page 110

Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
01: TK1 oil
circuit trouble
02: TK2 oil
circuit trouble
H16 H16
1∗: Compressor
1 side
2∗: Compressor
2 side
H17 H17
L02 L02 —
L03 — —
L04 L04 —
L05 — —
No. of priority
indoor units
L06 L06
L07 — —
L08 L08 —
L09 — —
Location
Description
of
detection
I/F Oil level All stop
detection
circuit trouble
Compressor Compressor All stop
P.C. board trouble
(Step-out)
Indoor unit Outdoor units Stop of
model corresponding
disagreement unit
trouble
Indoor unit Duplicated Stop of
indoor header corresponding
unit unit
I/F Duplicated All stop
outdoor line
address
I/F Duplicated All stop
priority indoor
unit (as
displayed on
priority indoor
unit)
I/F Duplicated All stop
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit)
Indoor unit Connection of Stop of
group control corresponding
cable to unit
standalone
indoor unit
Indoor unit Indoor group / Stop of
addresses not corresponding
set unit
Indoor unit Indoor capacity Stop of
not set corresponding
unit
– 110 –
Check code detection
System status
condition(s)
No temperature change is
detected by TK1 despite
compressor 1 having been
started.
No temperature change is
detected by TK2 despite
compressor 2 having been
started.
Judged that the
synchronization could not be
taken.
In case of different outdoor
unit (Not corresponded to
Air to Air Heat Exchanger
type)
There are more than one
header units in group.
There is duplication in line
address setting for outdoor
units belonging to different
refrigerant piping systems.
More than one indoor units
have been set up as priority
indoor unit.
More than one indoor units
have been set up as priority
indoor unit.
There is at least one
standalone indoor unit to
which group control cable is
connected.
Address setting has not
been performed for indoor
units.
Capacity setting has not
been performed for indoor
unit.
Check items (locations)
• Check for disconnection of
TK1 sensor.
• Check resistance
characteristics of TK1
sensor.
• Check for connection
trouble involving TK1 and
TK2 sensors
• Check for clogging in oil
equalizing circuit capillary.
• Check for refrigerant
entrapment inside
compressor.
• Check for disconnection of
TK2 sensor.
• Check resistance
characteristics of TK2
sensor.
• Check for connection
trouble involving TK1 and
TK2 sensors
• Check SV3F valve
malfunction.
• Check for clogging in oil
equalizing circuit capillary.
• Check for refrigerant
entrapment inside
compressor.
• Check power supply
voltage.
(AC380V-415V ± 10%).
• Check for failure in
compressor.
• Check for possible cause
of abnormal overloading.
• Check for failure in outdoor
P.C. board (compressor).
• Check outdoor unit model.
(Check whether the
outdoor unit corresponds
to Air to Air Heat
Exchanger type or not.)
• Check indoor addresses.
• Check for any change
made to remote controller
connection (group/
individual) since indoor
address setting.
• Check line addresses.
• Check display on priority
indoor unit.
• Check displays on priority
indoor unit and outdoor
unit.
• Check indoor addresses.
• Check indoor addresses.
Note:
This code is displayed
when power is turned on
for the first time after
installation.
Set indoor capacity. (DN =
11)