Controller Type "B" (Chw 29 To Chw 602; Cho 29 To Cho 242; Chg 24 To Chg 140) - omi CHW 09 Manual De Uso Y Mantenimiento

710.1760.00.01-00

CONTROLLER TYPE "B" (CHW 29 TO CHW 602; CHO 29 TO CHO 242; CHG 24 TO CHG 140)

No. Device Alarm
status code
OFF
z
A08
Fan, Com-
pressor and
1
pump are
A09
not working
ACF1
ACF2
ACF3
ACF4
ACF5
AFr
EE
A01
Fan and
compressor
A02
are not
2
working,
pump is
working
A07
A09
Alarm descrip- Possible cause
tion
Remote ON/OFF contact is
Unit is in Off by
open or internal bridge
remote ON/OFF
removed
The unit is energized but
Unit in stand by
not switched on
Liquid flow too low
Flow switch alarm
Liquid in the tank too low
Thermal protections of a
new unit are in OFF posi-
Pump thermal
tion
switches alarm
Pump is having problem
Configuration Parameters set up in a
alarm wrong way
The frequency of power
Frequency alarm
supply is out of range
Internal problem of the
Eeprom run
controller
Ambient temperature too
high
Dirty condenser
Refrigerant high
Fan is not working fine or
pressure alarm
the sense of rotation is not
correct
Required cooling capacity
is higher than nominal
Air filter dirty (only for
units with this kind of op-
tion)
Unit low on refrigerant
Liquid flow too low
Refrigerant low
Percentage of antifreeze
pressure alarm
too low or not present,
even for range of tempera-
ture higher than 5°C
Dirty evaporator
Percentage of antifreeze
too low
Set point is too low for ac-
tual system
Antifreeze alarm
Liquid flow too low
Dirty evaporator
Thermal protection of a
new unit are in OFF posi-
Compressor
tion
thermal switche
alarm
Compressor is having
problem
Recommended remedy
Check bridge ROO and close the
contact
Follow procedure to start up the
unit using button on contoller
Check right rotation of the pump
and possible obstruction on liquid
circuit
Fill the tank
Switch MTP in ON
Check pump and possible ob-
struction on liquid circuit
Check parameter setup
Check correct power supply
Reset alarm and in case of per-
sistent problem change controller
Decrease ambient temperature,
increasing ventilation of the
room, removing heat sources or
repairing the unit from the direct
rays of sun
Clean the condenser as described
in maintenance
Check fuse of the fan, and right
rotation
Decrease the required cooling
capacity
Dismount the filter from the unit
and clean it with air or with wa-
ter
Check liquid sight glass and in
case contact service
Check right rotation of pump and
possible obstruction on liquid cir-
cuit
Add antifreeze, or try to increase
temperature or flow of liquid the
combination of these three ele-
ment can cause ice problem
Clean evaporator and in case
contact service
Add antifreeze to the liquid
If possible increase set point, or
check combination of flow, tem-
perature and antifreeze percent-
age
Check right rotation of pump and
possible obstruction on liquid cir-
cuit
Clean evaporator and in case
contact service
Switch MTC in ON
Reset thermal switch and in case
contact of a persistent problem
contact service
30
22/07/2009
Restore (*)
A
A
A
becomes
M after 1
events in 1
hour
M after reset
MTP
A
A
M
M after reset
high pressure
switch using
button on it if
present
A
becomes
M after 10
events in 1
hour
M
M after reset
MTC