HWA1-A
Air/water chillers with axial fans
24
19.3
E002
–
LOW PRESSURE
If the on board pressure transducer detects a pressure lower than value set from the controller (
A16=5
bar by default in cooling
mode, 1.5 bar in heating mode) the alarm will be activated. In this case the compressor will stop immediately. The alarm will reset
when the pressure goes over a hysteresis of 2.0bar.
If the alarm occurs more than 3 times per hour, the alarm becomes a manual reset.
19.4
E003
–
COMPRESSOR (C1) THERMAL PROTECTION
These alarms are assigned with digital input. The alarm will be activated when the concerned digital input switches to the active
state. It resets automatically when the contact returns to its rest state.
19.5
E013
–
COMPRESSOR (C2) THERMAL PROTECTION
These alarms are assigned with digital input. The alarm will be activated when the concerned digital input switches to the active
state. It resets automatically when the contact returns to its rest state.
19.6
E004
–
FAN MOTOR THERMAL PROTECTION
These alarms are assigned with digital input. The alarm will be activated when the concerned digital input switches to the active
state. It resets automatically when the contact returns to its rest state.
19.7
E005
–
ANTIFREEZE ALARM
The alarm will be activated when the outlet water temperature sensor is less than 4°C. It turns off when the temperature becomes
higher than +7°C.
19.8
E006
–
FLOW SWITCH ALARM
The water side flow switch is already installed inside the unit and must NOT be tampered or bypassed in any way. The flow switch
is bypassed for 10 seconds from the start-up of the machine. The alarm signalization occurs after 5 seconds of error persistence
(lack of water flow, air in the circuit, etc.). The alarm is automatically reset for the first 2 times and goes off after 5 seconds. If the
alarm occurs more than 3 times per hour, the manual reset of the alarm is required.
The alarm is not active for 10 seconds after activating the circulator.
19.9
E009
–
HIGH DISCHARGE TEMPERATURE
In the case of a unit with the optional
“
Gi
”
module, there is a compressor discharge sensor with the following management of high
discharge temperature:
If the discharge temperature exceeds Pa
C64
, the
E009
alarm appears and the compressors stop operation.
If the discharge temperature drops below Pa
C65
, the alarm disappears and the compressors are again ready to operate.
19.10
E016 USAGE PUMP 1 THERMAL PROTECTION
The alarm will be activated when the concerned digital input switches to the active state. It resets automatically when the contact
returns to its rest state.
In case of alarm, the pump in matter will be blocked. If there is no other resources to use (1 serviceable pump only or both
unserviceable pumps) obviously the whole unit will be blocked.
19.11
E026 USAGE PUMP 2 THERMAL PROTECTION
The alarm will be activated when the concerned digital input switches to the active state. It resets automatically when the contact
returns to its rest state.
In case of alarm, the pump in matter will be blocked. If there is no other resources to use (1 serviceable pump only or both
unserviceable pumps) obviously the whole unit will be blocked.
19.12
E018
–
HIGH TEMPERATURE
If the water outlet sensor records a value higher than 65°C for at least 50 seconds, the alarm is active. The alarm goes off when the
temperature becomes below than 62°C.
19.13
E042
–
POOR HEAT EXCHANGE
This alarm will be activated only during sanitary hot water production and goes on during this operating mode when the outlet
temperature exceeds the parameter
H01
. When the alarm goes on, the compressors stop to operate. The alarm goes off if the
return temperature drops below the
H01 - b03
threshold, and in this case the compressors are again ready to start-up.
If the alarm goes on for 3 consecutive times during the same sanitary production cycle, it temporarily inhibits sanitary production
and the unit returns to operate for the plant side.
The inhibition of sanitary hot water production will be cancelled when the plant regulation achieves below the setpoint value with
b05
or in any case, if there is no need of thermoregulation on the plant.
Note:
The
E042
alarm remains active all along the entire cycle of sanitary hot water production.
19.14
E101 - I/O MODULE COMMUNICATION TIMEOUT
There is 10-second of timeout for communication between the main board and its I/O expansion boards.
If the communication fails, the automatic reset alarm goes on.
The alarm is only managed if the I/O configuration requires the presence of the module in matter.
These alarms lock the whole unit because a priori do not know what functions are associated with the I/O ports on the module
which does not communicate.
Summary of Contents for HWA1-A 0140
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