H-20
TF3 Series
Alarm (Except 1CH, Compressor Output Model: TF31-1
)
※
H: alarm output hysteresis [
aHY
]
※
1: To clear alarm, turn OFF the power (also digital input [
DI
] is set as RUN/STOP [
STP
] and input is ON for
pausing compressor output) or press the front key once. (press twice when buzzer is set)
※
2: Condition of re-applied standby sequence for standby sequence: Power ON, changing temperature,
alarm settings, switching STOP mode to RUN mode (also digital input [
DI
] is set as RUN/STOP [
STP
] and input turns
OFF from ON for operation mode by releasing pause compressor output)
Set both alarm operation and alarm option by combining. Alarm function is available for comdefrost or auxiliary
(alarm/evaporator-fan) output model (TF3 -2
- ). Also defrost/auxiliary output [
sDA
] of parameter 1 group should be
set as auxiliary [
AUX
], and auxiliary output [
AUX
] should be set as alarm [
ALM
].
In case of comauxiliary (alarm/evaporator-fan) output model (TF3 -3
- ), auxiliary output [
AUX
] of
parameter 1 group should be set as alarm [
ALM
].
Alarm operation [
AL
]
Alarm option [
AlT
]
Mode
Name
Alarm operation
Description
OFF
-
-
No alarm output.
AlD
Deviation
high, low-limit
alarm
PV
-10
℃
PV
20
℃
SV
0
℃
OFF
ON
ON
H
H
High-limit deviation [
AlH
]: Set as 20,
Low-limit deviation [
AlL
]: Set as 10
If deviation between present value (PV) and setting
value (SV) is higher than high-limit or low-limit
deviation SV, alarm output turns ON.
Mode
Name
Description
AlA
Standard alarm
If it is an alarm condition, alarm output is ON. If it is a clear alarm condition, alarm output is OFF.
AlB
Alarm latch
※
1
If it is an alarm condition, alarm output is ON and maintains ON status.
AlC
Standby sequence 1
First alarm condition is ignored and from second alarm condition, standard alarm operates.
When power is supplied and it is an alarm condition, this first alarm condition is ignored and from the
second alarm condition, standard alarm operates.
AlD
Alarm latch and
standby sequence 1
If it is an alarm condition, it operates both alarm latch and standby sequence. When power is supplied
and it is an alarm condition, this first alarm condition is ignored and from the second alarm condition,
alarm latch operates.
AlE
Standby sequence 2
First alarm condition is ignored and from second alarm condition, standard alarm operates.
When re-applied standby sequence
※
2
and if it is alarm condition, alarm output does not turn ON.
After clearing alarm condition, standard alarm operates.
AlF
Alarm latch and
standby sequence 2
Basic operation is same as alarm latch and standby sequence 1. It operates not only by power ON/OFF,
but also alarm set value, or alarm option changing. When re-applied standby sequence
※
2
and if it is alarm
condition, alarm output does not turn ON.
After clearing alarm condition, alarm latch operates.
