58
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code
Operation cause
1. Connection error of communication cable between
inverter and interface P.C. boards
[04]
2. Defective interface P.C. board
Inverter communication alarm
3. Defective inverter P.C. board
4. Noise from outside
5. High level refrigerant leak if RBC-RD2-PE fitted.
Is communication connector
between inverter and interface
P.C. boards connected
?
Is there continuity
of the communication cable
between inverter and
interface P.C. boards
?
Is there voltage present
between pins 4 and 5 of
CN600 on interface P.C. boards
?
[Measurement by tester:
DC 0 to 5V, 5 pin GND]
Is there voltage present
between pins 3 and 5 of
CN600 on interface P.C. boards
?
[Measurement by tester:
DC 0 to 5V, 5 pin GND]
Check noise interference from
outside, etc.
Refrigerant leak.
Leak check unit.
Check connection
On inverter P.C. board:CN07
On interface P.C. board:CN600
[
]
Replace communication cable.
Interface P.C. board is defective.
Inverter P.C. board is defective.
No
Yes
No
No
Yes
Yes
No
Yes
Is refrigerant detector
RBC-RD2-PE fitted to unit
?
Yes
Are the High Level Alarm and
the shutdown LEDs (Red) on
?
Complete checks detailed above.
No
Yes
Complete checks detailed above.
No
Summary of Contents for MM-A0160HX
Page 1: ...Service Manual Air Conditioner Multi Split Type System Modular Multi System HFCR407C A90 0130 ...
Page 2: ......
Page 133: ...134 20 Additional Literature and Contacts ...
Page 134: ...135 20 Additional Literature and Contacts ...
Page 135: ...TOSHIBA AIR CONDITIONING www toshiba aircon co uk MADE IN UK A90 0130 Revised April 2001 ...
