Daikin VRVII Manual page 82

Troubleshooting by Indication on the Remote Controller
Note:
∗1. Pull out and insert the connector once and check it is
absolutely connected.
∗2. Method to check transmission part of indoor unit
PCB.
Turn OFF the power and remove the connector of
indoor unit PCB.
Short circuit the connector.
After turning ON the power, check below numbers
under field setting from remote controller.
(Confirmation: Second code No. at the condition
of first code No. 21 on mode No. 41)
Determination
∗ After confirmation, turn OFF the power, take OFF
the short circuit and connect the connector back
to original condition.
↓
01: Normal
Other than 01: Transmission error on
indoor unit PCB
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