Toshiba MCY-MUG0401HSW-E Service Manual page 168

Check code
Outdoor 7-segment display
Sub-code
P10 Indoor unit No. detected
P11 –
P13 –
P14 01: Outdoor unit valve is close
P15 01: TS1 condition
02: TD condition
P19 –
P20 –
(Check code detected by Inverter featuring in outdoor unit - typical examples)
Check code
Outdoor 7-segment display
Sub-code
F13
1∗
H01
1∗
H02
1∗
H03
1∗
H17
1∗
P05 1*: Compressor
*E : Fan moter
1∗
P07
P22 *0: IGBT short circuit
*1: Position detection circuit trouble
*3: Motor lockup trouble
*4: Motor current trouble
*C: TH sensor temperature trouble
*D: TH sensor short circuit, release
trouble
(*: Fan motor number)
P26
1∗
P29
1∗
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
controller Operation Timer Ready
Flash
display
(P10) ALT
P11
ALT
P13
ALT
P14
ALT
P15
ALT
P19
ALT
P20
ALT
Display of receiving unit
Central control Indicator light block
or main remote
controller Operation Timer Ready
Flash
display
F13
ALT
H01
H02
H03
H17
P05
ALT
P07
ALT
P22
ALT
P26
ALT
P29
ALT
167
Typical problem site
Indoor unit overflow Indoor unit has been shutdown in one refrigerant
line due to detection of overflow (detected by
indoor unit).
Outdoor heat exchanger Remaining frost on outdoor heat exchanger has
freeze trouble been detected repeatedly.
Outdoor liquid backflow State of refrigerant cycle circuit indicates liquid
detection trouble backflow operation.
Another refrigerant cycle Outdoor unit valve is forget to open during test
protection run.
Gas leak detection Outdoor suction temperature sensor (TS1)
detects sustained and repeated high
temperatures that exceed standard value.
4-way valve reversing Abnormality in refrigerating cycle is detected
trouble during heating operation.
Activation of high-pressure High pressure (Pd) sensor detects high pressure
protection that exceeds standard value.
Typical problem site
Temperature sensor built into indoor IPM
Trouble in temperature
sensor built into indoor
(TH) has been open/short-circuited.
IPM (TH)
Compressor breakdown Inverter current (Idc) detection circuit
detects overcurrent.
Compressor trouble Compressor lockup is detected
(lockup)
Current detection circuit Abnormal current is detected while inverter
trouble
compressor is turned off.
Compressor trouble (Step Compressor is in step-out condition.
out)
Inverter Vdc trouble Inverter DC voltage is too high (over
voltage) or too low (under voltage).
Heat sink overheat trouble Temperature sensor built into IPM (TH)
detects overheating.
Outdoor fan P.C. board Outdoor fan P.C. board detects trouble.
trouble
Compressor start up Open phase or IPM over current for
trouble
compressor is detected.
Compressor position Compressor motor position detection
detection circuit trouble
trouble is detected.
Description of Check code
Description of Check code