Haier HCFU-18CF03 Service Manual page 48

CENTRAL control function
When the central controller selects [CENTRAL] mode, the buttons in the wired controller
except for [CHECK] will be invalid.
VENTILATION mode (only for the unit with fresh air function or heat recovery
function)
Press [RECOVERY] button, then the unit will switch over the ventilation mode:
[ ]
[VENTALATION][NORMAL]
Query indoor malfunction history:
In the state of power on or power off, press [CHECK] button, enter the malfunction-querying
mode of all indoor units in the group. Then [CHECK] and [UNIT NO.] will display, and the
actual indoor numbers will be displayed in some sequence (unit number is in decimals). At
the same time, in the time region, there will be the current malfunction and the latest time
malfunction, the displaying format is [XX YY], in which XX stands for the current malfunction,
if normal, it will display "
every unit will display for 3 seconds. After the failure codes of all indoor units in the whole
group are displayed, the mode will quit automatically.
Clear abnormal state and malfunction history:
In normal state, press [CHECK] button for 5 seconds to clear abnormal states, at the same
time, wired controller will send the data of "clear abnormal state", but the malfunction history
still retains.
In normal state, press [CHECK] button for 15 seconds, except for malfunction states, the
malfunction history in wired controller will be cleared.
Query indoor performance state:
In normal state, press both buttons of [CHECK] and [FILTER] for 5 seconds, in the set
temperature region in the screen, [XX] will display, XX is indoor number, which can be
selected by pressing [TEMP] [+] [-]. In the timer region in the screen, [YZZZ] will display, in
which Y stands for data type, ZZZ stands for the corresponding data. which can be selected
by pressing [CLOCK] [+] [-].
Y
A
B Request of indoor capacity Hz
C Temperature
temp. sensor TA
d Temperature of indoor gas pipe
sensor TC1
E Temperature of indoor liquid pipe
sensor TC2
F
48
Commercial Air Conditioner
[VENTILATION][AUTO]
[ ], please select appropriate ventilation mode.
"; YY stands for the latest time malfunction. The failure code of
ZZZ
Indoor capacity (W)
of indoor
Open degree of indoor PMV
Model: HCFU-18/28CF03
[VENTILATION][RECOVERY]
Nominal cooling
capacity/10, decimal
Actual value, decimal
ambient Actual value, decimal
Actual value, decimal
Actual value, decimal
Actual value, decimal
HCFU-18/28HF03
Type