Error Mode Detected By Outdoor Unit - Toshiba RAV-SM560AT-E Service Manual

Operation of diagnostic function
Check
Cause of operation
code
Inverter over-current protective
circuit operates.
(For a short time)
Error on current detection
circuit
• Current value is high at AC
side even while compressor
stops.
• Phase of power supply is
missed.
Coming-off, disconnection or
short of outdoor temp sensor
Coming-off, disconnection or
short of outdoor temp sensor
Compressor drive output error
• Tin thermistor temp, Tin error
(IPDU heat sink temp. is high.)
Communication error between
IPDU
• Connector coming-off
between CDB and IPDU
Compressor does not rotate.
(Over-current protective circuit
works when constant time
passed after activation of
compressor.)
Discharge temp error
• Discharge temp over
specified value was detected.
Compressor breakdown
• Operation frequency lowered
and stops though operation
had started.
High-voltage protection error
by TE sensor
• TE temp over specified value
was detected.
DC outdoor fan motor error
• IDC operation or lock was
detected by DC outdoor fan
driving.
Error on IPDU position
detection circuit
Coming-off, disconnection or
short of outdoor temp sensor

Error mode detected by outdoor unit

Status of air
Condition
conditioner
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
All stop Displayed when
error is detected
Operation Displayed when
continues error is detected
– 120 –
Judgment and measures
1. Inverter immediately stops even if restarted.
• Compressor rare short
2. Check IPDU.
• Cabling error
1. Compressor immediately stops even if restarted.
: Check IPDU.
2. Phase-missing operation of power supply
• Check power voltage of R, S, T.
1. Check outdoor temp sensor (TE, TS).
2. Check CDB.
1. Check outdoor temp sensor (TD).
2. Check CDB.
1. Abnormal overload operation of refrigerating cycle
2. Loosening of screws and contact error of IPDU and
heat sink
3. Cooling error of heat sink
4. Check cabling of CDB and IPDU.
1. Compressor error (Compressor lock, etc.)
: Replace compressor.
2. Cabling trouble of compressor (Phase missing)
1. Check refrigerating cycle. (Gas leak)
2. Error of electron control valve
3. Check pipe sensor (TD).
1. Check power voltage. (AC200V±20V)
2. Overload operation of refrigerating cycle
3. Check current detection circuit at AC side.
1. Overload operation of refrigerating cycle
2. Check outdoor temp sensor (TE).
1. Position detection error
2. Over-current protection circuit operation of outdoor fan
drive unit
• Check CDB.
• Refer to Judgment of outdoor fan.
1. Position detection circuit operates even if driving by
removing 3P connector of compressor.
• Replace IPDU.
1. Check outdoor temp sensor (TO).
2. Check P.C. board.