X-multi series commercial air conditioning (42 pages)
Summary of Contents for Haier Arctic Multi Series
JUNE 2019 DFS05-19 Service Bulletin Multi-Split Communication Wiring Check The FlexFit Multi and Arctic multi systems are capable of performing a self-test to check communication wiring between the outdoor to the indoor units. This is a crucial step when performing start-up on a system as well as performing checks during a service call.
JUNE 2019 DFS05-19 Service Bulletin Testing Process: All indoor fans will come on at HIGH fan speed. EEV for Circuit A will open. All other EEV’s will close. After a 3 minute delay, the Compressor will start and ramp up to 55HZ. The digital display will alternately display “CH”...
JUNE 2019 DFS05-19 Service Bulletin Testing Process (continued): Once all indoor units have been checked, the digital display will show either “EC” or “0” • “EC” indicates there is an error in the wires to the indoor unit(s). • The LED(s) will be flashing, indicating which circuit(s) has the fault. •...