Haier YR-H 71 Service Manual page 50

Maintenance
Status Inspection
Control unit A when select single unit, and when unit A fails to function, detector will forward transfer
malfunction information during inquiry. Control unit A and B when select two units, as long as one air
conditioner fails to function, detector will forward transfer malfunction information during inquiry.
Display of detector running status and operation indicator: 0.5 second ON and 0.5 second OFF of
operation indicator is a cycle, and indicate information using times of the cycle, which form status
indication, and an interval of 2 seconds between status indication and status indication. Detector puts
all detected status together to form a status indication cycle, and an interval of 4 seconds between
status indication and status indication. For example: under two-unit status, there is an air conditioner
interface communication error, then indication 2 + 2 seconds waiting + indication 3 + 4 seconds
waiting and recycles like this.
Serial Flashing
No. times
1 1
2 2
3 3
4 4
5 5
6 6
7 7
Be sure to cut off manually controlled power supply switch when maintenance.
Wipe with a soft dry cloth. If too dirty, immerse cloth in diluted neutral detergent and wipe after wring
the cloth, and clean with dry cloth.
Forbid to wipe with gasoline, thinner, household cleanser or chemical wiping cloth, otherwise may
result in color change, paint-fading, deformation or break.
Communication error with previous unit interface RS-485
Communication error with previous unit interface RS-232C
Communication error with interface of air conditioner A
Communication error with interface of air conditioner B (do not check this
interface under single unit status
Data error of detector's EEPROM
Data collection of air conditioner cannot inquiry and confirms error.
Control commands from previous unit cannot be performed.
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Meaning