Midea MHC-96HWD1N1(A) Service Manual page 73

MCAC-UTSM-201503 R410A Full DC Inverter Split Duct Type Technical Manual
2.3 Other operations
※ Various locking functions
1. Centralized controller locking
The centralized controller locking state will be recorded when powered off. It won't dismiss when re-power
on until receiving the unlocking order.
1) Effect
① When the centralized controller is under locking state, it cannot change the air conditioner's operating
state through the centralized controller (such as ON/OFF the unit, setting mode, change the setting
temperature, change the fan speed, unlock the exiting locking state etc.), but it can do the query operation,
until unlocking and then recover to normal.
② When the centralized controller is under the locking state, all the air conditioners in the centralized
controller network will be remote controller locked.
2) Operation
① Locking
The centralized controller can be locked by the computer only.
② Unlocking
a) When the centralized controller and computer communicate normally
The centralized controller can be unlocked by the computer only. When the centralized controller is
unlocked, the controller will send the order to unlock the remote controller locking of all the air
conditioners.
b) When the centralized controller and computer communication abnormally
When the centralized controller is locking, the centralized controller can be unlocked by the way that the
press QUERY key and holds on, then press MODE key (it should operate within one minute after
centralized controller is re-powered on or the RESET key is pressed).
The remote controller locking of the air conditioner is remained.
2. Remote controller locking
1) Effect
① When the air conditioner is under remote controller locking state, it will not receive the remote signals
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