Installation & owner's manual
8. MAINTENANCE AND UPKEEP
8.1 Failure information and code
In case the unit runs under abnormal condition, failure
protection code will display on both control panel and wired
controller, and the indicator on the wired controller will flash
with 5Hz. The display codes are shown in the following table:
Table 8-1
8.2 Ordinary displayed data
a. Ordinary displayed data are displayed in all display pages.
b. If the unit system is under running state, i.e. one or more than
one modular unit is under running operation, there will be a
dynamic display of . If the system is under OFF state,
there is no display.
c. If the communication with the main unit modular unit is fail, it
displays E2
d. If it is under the host computer network control,
Net
displays,
otherwise there is no display.
e. If it is under wired controller locked or button locked state, it
displays the lock mark. There will be no display after the lock
is unlocked.
8.3 Treatment of display data
The data display area is divided into Up area and Down area,
with two groups of two-digit half 7-segment digital display,
respectively.
a.Temperature display
Temperature display is used for displaying the total outlet water
temperature of unit system, outlet water temperature ,condenser
pipe temperature T3A of system A, condenser pipe temperature
T3B of system B, outdoor environmental temperature T4,
anti-freezing temperature T6 and setting temperature Ts, with
allowable data display scope -15
℃～
70
℃
. If the temperature is
higher than 70
℃
, it is displayed as 70
℃
. If there is no effective
date, it displays “— —” and indication point
。
C
is on.
b. Current display
Current display is used for displaying modular unit system A
compressor current IA or system B compressor current IB, with
allowable display scope 0A~99A. If it is higher than 99A, it is
displayed as 99A. If there is no effective date, it displays “— —”
and indication point
A
is on.
c. Failure display
It is used for displaying the total failure warning date of unit or
that of modular unit, with failure display scope E0~EF, E
indicating failure, 0~F indicating failure code. “E-“ is displayed
when there is no failure and indication point
#
is on at the same
time.
d. Protection display
It is used for displaying the total system protection data of unit or
the system protection data of modular unit, with protection
display scope P0~PF, P indicating system protection, 0~F
indicating protection code. “P-“ is displayed when there is no
failure .
e. Unit number display
It is used for displaying the address number of the currently
selected modular unit, with display scope 0~15 and indication
point
#
is on at the same time.
21
Modular Chiller MUEN-H6
E0
E1
E2
E3
E4
E5
E6
E7
E8
E9
EA
Eb
EC
Ed
EF
P0
P1
P2
P3
P4
P5
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Code
Reason
Error of outdoor EEPROM
Power phase sequence error
Communication error
Error of total outlet water.temp sensor(Be valid for main unit)
Pipe temperature sensor in condenser A error
Pipe temperature sensor in condenser B error
Outdoor ambient temperature sensor error
Low pressure protection System A (manual recovery)
Low pressure protection System B (manual recovery)
High pressure or air discharge temperature protection in system B (manual recovery)
Current protection in system A (manual recovery)
Current protection in system B (manual recovery)
Condenser high temperature protection in system A
Condenser high temperature protection in system B
System anti-frozen protection
Anti-freezing pressure protection of the system A (manual recovery)
Anti-freezing pressure protection of the system B (manual recovery)
Wire control detect that the units on-line have decreased.
Output of the power protector error
Water flow detection error(manual recovery)
High pressure or air discharge temperature protection error in system A (manual recovery)
Freeze-proof temperature sensor in shell and tube exchanger error
Error of unit outlet water.temp sensor
P6
P7
P8
Pb
Low ambient temperature drive-up protection
PA
PC
Pd
PE
Error of inlet water temperature sensor
P9
Protection of outlet and inlet water temperature difference
Low-temperature protection of evaporator (manual recovery)
29
30
(Reserved failure code)
(Reserved failure code)
(Reserved failure code)
f. Display of online unit number and startup unit number
They are used for displaying the total online modular units of the
whole unit system and the number of the modular unit under
running state, respectively, with display scope 0~16.
Any time when the spot check page is entered to display or
change modular unit, it is needed to wait for the up-to-date data
of the modular unit received and selected by wired controller.
Before receiving the data, the wired controller only displays
“——” on the data display Down area, and the Up area displays
the address number of the modular unit. No page can be turned,
which continues until the wired controller receives the communi-
cation data of this modular unit.
