[De] Indoor Address Undefined; [Df] Outdoor Address Undefined - Toshiba HFCR407C Service Manual

Check code
[dE]
Indoor address undefined
While this check code is displayed, wait for a moment. When the address is defined, the operation is
automatically reset. However, if the check code does not disappear 20 minutes after the power source was
turned on, a fault is considered. Check the following items.
• Fault check of indoor unit PC board
• Source check of communication noise interference
• Incorrect set-up of jumper options on indoor unit PC board
Check code
[dF]
Outdoor address undefined
While this check code is displayed, wait for a moment. When the address is defined, the operation is
automatically reset. However, if the check code does not disappear 20 minutes after the power source was
turned on, a fault is considered. Check the following items.
• Fault check of outdoor unit interface PC board
• Source check of communication noise interference between outdoor units.
14
Troubleshooting
Diagnostic procedure for check code
116
Operation cause
1. Indoor unit in automatic addressing mode
2. Indoor unit PC board set-up error
3. Defective indoor unit PC board
4. Communication noise interference
Operation cause
1. Outdoor unit in automatic addressing mode
2. Defective indoor unit interface PC board
3. Communication noise interference