Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual page 138

Check code Check code name
[P07] / [1C] Heat sink overheat error
(TCC-L / AI-NET)
NO
Is power voltage normal?*
* 220–240V ± 10%
YES
NO
Is wiring of comp IPDU normal?
YES
NO
Is outdoor fan normal?
YES
YES
Is fixing between comp IPDU and heat sink loose?
NO
Check IPDU P.C. board.
Check code Check code name
[P10] / [0b] Indoor overflow error
(TCC-L / AI-NET)
Auxiliary code: Indoor units address with trouble
Is float SW connector
NO
(Indoor control P.C. board CN34)
connected normally?
YES
NO
Does float SW operate?
YES
NO
Does drain pump operate?
YES
Check drain pipe, etc.
Cause of operation
1. Power voltage error
2. Outdoor fan system error
3. Heat sink installation error
4. Clogging of hear sink cooling duct
5. IPDU P.C. board error (TH sensor error)
Correct power line.
Correct wiring such as cable to compressor.
Check fan and fan motor.
Tighten screws.
Cause of operation
1. Float SW operation error
2. Drain pump operation error
3. Clogging of drain pipe
4. Indoor P.C. board error
Correct
connector connection.
NO
Is wiring normal? Check and correct wiring.
YES
®
Check indoor P.C. board.
Failure Replace
NO
®
Is power supply to Check indoor P.C. board.
drain pump normal? Failure Replace
YES
Replace drain pump,
• Check there is 220–240 V voltage of
and check cabling.
1-3 pin of CN68 on indoor P.C. board.
Check code Check code name
[P12] / [11] Indoor fan motor error
(TCC-L / AI-NET)
* Detectable
Turn off power supply.
Is there connection error or YES
disconnection on connector CN333, CN334
of indoor P.C. board (MCC-1402)?
NO
Remove connectors CN333 and CN334
on indoor P.C. board (MCC-1402).
NO
Does fan turn without trouble
when turning it with hands?
YES
Is resistance value between each phase
NO
at motor side of fan motor connector CN333 on
indoor P.C. board (MCC-1402) correct? * 1
YES * 1
• Is not winding 1 (Red lead) to 3 (White lead), 3 (White lead) to 5 (Black lead),
5 (Black lead) to 1 (Red lead) opened/shorted? Resistance value should satisfy the follows.
[4-way Air Discharge Cassette, Compact 4-way Air Discharge Cassette type]
MMU-AP0091H to AP0301H, MMU-AP0071MH to AP0181MH : Approx. 70 W to 100 W
MMU-AP0361H, AP056H1 : Approx. 35 W to 50 W
[1-way Air Discharge Cassette 2 series, Concealed Duct Standard, Under Ceiling, High Wall 1 series ,
Slim Duct type] 15 W to 35 W
• Check insulation resistance between the cabinet and 1, 3, 5 : Should be 10 M W or more.
Is resistance value at motor side of
NO
fan motor connector CN334 on indoor P.C. board
(MCC-1402) correct? * 2
YES * 2
Check insulation resistance value of fan motor position detective circuit.
• Is winding 1 (Yellow lead) to 4 (Pink lead) opened/shorted? ® Resistance should be 5k W to 20k W
NO
Is output of indoor fan motor position
detective signal correct? * 3
* 3
YES
Check fan motor position detective signal.
• Measure voltage with tester between CN334 1 and 5 on indoor P.C. board (MCC-1402)
under condition of CN333 and CN334 installed and power-ON.
® Turn fan slowly with hands so that pin voltage
CN333
• Between 4 and 5: 5V
CN334
Cause of operation
1. Cabling error of fan motor connector
2. Fan motor error
3. Indoor P.C. board error
with DC fan motor
only in models
( 4-way Air Discharge Cassette, or Concealed Duct Standard type
Under Ceiling, or High Wall type
Correct connector connection.
Replace indoor fan motor.
Replace indoor fan motor.
Replace indoor fan motor.
Replace indoor fan motor.
fluctuates between 0 and 5V.
®
Check indoor P.C. board (MCC-1402).
Failure Replace
)
.