Toshiba MMY-MUP0721HT9P-UL Service Manual page 174

(Check code detected by Inverter of Compressor featuring in outdoor unit - typical examples)
Check code
Outdoor 7-segment display
Sub-code
1∗: Compressor 1
F13
2∗: Compressor 2
1∗: Compressor 1
H01
2∗: Compressor 2
1∗: Compressor 1
H02
2∗: Compressor 2
1∗: Compressor 1
H03
2∗: Compressor 2
1∗: Compressor 1
2∗: Compressor 2
1∗: Compressor 1
H28
2∗: Compressor 2
1∗: Compressor 1 side
P05
2∗: Compressor 2 side
1∗: Compressor 1 side
P07
2∗: Compressor 2 side
1∗: Fan P.C. board 1
P22
2∗: Fan P.C. board 2
1∗: Compressor 1
P25
2∗: Compressor 2
1∗: Compressor 1
P26
2∗: Compressor 2
1∗: Compressor 1
P29
2∗: Compressor 2
Note: The above check codes are examples only, and different check codes may be displayed depending on the outdoor unit configuration
Display of receiving unit
Indicator light block
Central
control or
main remote
Operation Timer Ready
controller Flash
display
F13 ALT
H01
H02
H03
H28
P05
ALT
P07 ALT Heat sink overheat trouble
P22 ALT
P25 ALT
P26 ALT
P29 ALT
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Typical problem site
Trouble in temperature
Temperature sensor built into indoor IPM (TH)
sensor built into
has been open/short-circuited.
indoor IPM (TH)
Inverter current (Idc) detection circuit detects
Compressor breakdown
overcurrent.
Compressor trouble
Compressor lockup is detected
(lockup)
Current detection circuit Abnormal current is detected while inverter
trouble compressor is turned off.
Compressor trouble
Compressor is in step-out condition.
(Step out)
Compressor motor winding is layer shorted.
Compressor motor
winding trouble
Inverter DC voltage is too high (overvoltage)
Compressor Vdc trouble
or too low (undervoltage).
Temperature sensor built into IPM (TH) detects
overheating.
Outdoor fan P.C. board
Outdoor fan P.C. board detects trouble.
trouble
IPM for compressor is broken.
Compressor P.C.board
trouble (short-circuit etc.)
Open phase or IPM overcurrent for
Compressor start up
trouble compressor is detected.
Compressor position Compressor motor position detection trouble is
detection circuit trouble detected.
Description of Check code