The CH-07 or Different Operation Mode Error appears on the thermostat display screen whenever any of the indoor units is set to different Cool/Heat operation modes than the others. A two-digit number will appear on the wired thermostat LCD display, e.g. CH05. If the multi-setting unit installation does not feature a wired remote the fault will be displayed on the LED display window of the front panel of the delinquent indoor unit.
All the indoor head units of a multi-split HVAC product installation connected to a single outdoor compressor unit should be programmed in cooling mode, or heating mode, all at the same time. Example: the air conditioner does not work when the indoor head unit in a room runs is set to run in cooling mode, while the unit in another room is programmed in heating mode.
1. Check the location of the power circuit breaker of the air conditioner, and then trip the breaker and reset it again approximately 3 minutes later.
If you don’t know the location of the circuit breaker, call your building management office.
2. Upon re-starting all the indoor units, press Select Mode button to use the units in cooling mode, or heating mode only.
(Trip the circuit breaker, and then reset it 3 minutes later.)
※ Press Mode button of all the indoor head units one by one to start them, and immediately Select Mode button to operate the air conditioner in the cooling mode or the heating mode only for all of them, no exception
This guide was created for all multi-split air conditioner models. Images or content presented herein may differ from your product.
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