Toshiba RAV-SM1100UT-E Service Manual page 53

8-5-2. Check Code Table
Block Check
display code
[MODE]
[TIMER] lamp
5Hz flash
*
[MODE] lamp
5Hz flash
: No display in the setting at shipment
*
Error mode detected by indoor unit (1)
Operation of diagnostic function
Cause of operation
The serial signal is not output
from outdoor unit to indoor unit.
• Miscabling of inter-unit cables
• Defective serial sending
circuit on outdoor P.C. board
• Defective serial receiving
circuit on outdoor P.C. board
• Compressor case thermo
operation
BUS communication circuit error
* BUS communication was
interrupted over the specified
time.
Network address miss-setting
• Addresses of central
controllers (Central control
remote controller, etc.) are
duplicated.
Error in 4-way valve system
• Indoor heat exchanger
temperature rise after start of
cooling operation.
• Indoor heat exchanger
temperature fall after start of
heating operation.
Error in other cycles
• Indoor heat exchanger temp
(TC) does not vary after start
of cooling/heating operation.
Coming-off, disconnection or
short of indoor temp sensor
(TA)
Coming-off, disconnection or
short of indoor temp sensor
(TC)
Coming-off, disconnection or
short of indoor temp sensor
(TCJ)
Status of air
Condition
conditioner
Operation Displayed when
continues error is detected
Operation Displayed when
continues error is detected
(According
to remote
controller of
indoor unit)
Operation Displayed when
continues error is detected
Operation Displayed when
continues error is detected
Operation Displayed when
continues error is detected
Operation Displayed when
continues error is detected
Operation Displayed when
continues error is detected
Operation Displayed when
continues error is detected
– 53 –
Judgment and measures
1. Outdoor unit does not completely
operate.
• Inter-unit cable check, correction of
miscabling
• Outdoor P.C. board check, P.C. board
cables check
• Compressor case thermo check
2. In normal operation
When outdoor sending serial LED
(Green) flashes, the receiving serial
LED (Orange) also flashes. : Indoor
P.C. board (Main P.C. board) check
When the receiving serial LED
(Orange) does not flash: Outdoor P.C.
board check
1. Communication line check, miscabling
check
Power supply check for central
controller (Central control remote
controller, etc.) and indoor unit
2. Communication check (XY terminal)
3. Indoor P.C. board check
4. Central controller check
(Communication P.C. board)
1. Check central control system network
address setting. (SW02)
2. Indoor P.C. board check
3. Central controller check
(Communication P.C. board)
1. Check 4-way valve.
2. Check 2-way valve and non-return
valve.
3. Check indoor heat exchanger sensor
(TC).
4. Check indoor P.C. board (Main P.C.
board).
1. Compressor case thermo operation
2. Coming-off of detection part of indoor
heat exchanger sensor
3. Check indoor heat exchanger sensor
(TC).
4. Check indoor P.C. board (Main P.C.
board).
1. Check indoor temp sensor (TA).
2. Check indoor P.C. board (Main P.C.
board).
1. Check indoor temp sensor (TC).
2. Check indoor P.C. board (Main P.C.
board).
1. Check indoor temp sensor (TCJ).
2. Check indoor P.C. board (Main P.C.
board).