Version Dmv, Dmv-I; Alarm Signalling And Management - AERMEC DMH Installation Manual

1

VERSION DMV, DMV-I

In the version with DMV-I integration, the unit is set up to operate in summer dehumidification mode, as already seen for the previous DMH/DMH-C versions, or in integration
mode.
The latter involves the activation of a 3-way valve that allows the water coming out of the condenser to be diverted either towards the post-heating coil or directly towards the
outlet, so as to have neutral or cooled air inlet respectively (see fig. 13). Therefore, if digital input ID4 is open, activation of either mode depends on the status of digital input
ID2, which acts on the 3-way valve actuator via voltage output R02.
— ID2 open dehumidification mode (3-way valve de-energised)
— ID2 closed summer integration mode, (3-way valve powered)

ALARM SIGNALLING AND MANAGEMENT

The alarm condition is signalled by a code on the display and activation of LED L7 in flashing or fixed mode, depending on whether it is signalling only or involves switching
off the unit (see alarm code table).
The alarm condition is also signalled by the closure of the R07 potential free contact (Cumulative Alarms).
All alarms are automatic reset, i.e. they automatically reset when the cause that generated them ceases to exist; with the exception of the high/low pressure alarms for refrig-
eration circuit E1/E2, which become manual reset if the number of operations/hours exceeds the preset value.
Alarm Description Condition
E01 High pressure sensor trip < AL7 times
E01 High pressure sensor tripped ≥ AL7 times
E01 High or low pressure sensor trip < AL7 times
E01 High or low pressure sensor trip ≥ AL7 times
E02
Low pressure sensor trip < AL2 times
E02 Low pressure sensor trip ≥ AL2 times
E03
Probe S02 air inlet out of range [condition a]
E04 Probe S01 water inlet out of summer range [condition b]
E04 Probe S01 water inlet out of summer range [condition b]
E05 S01 water inlet probe broken or malfunctioning
E06 S02 air inlet probe broken or malfunctioning
E07
Probe S01 water inlet is out of winter range [condition d]
E08 S03 refrigerant inlet temperature probe broken or malfunctioning
E09
S04 refrigerant outlet temperature probe broken or malfunctioning
16
3
2
4
5
Condition
if H51=0
if H51=0
if H51=1
if H51=1
if H51=0
if H51=0
In dehumidification or summer integration
if H50=0
if H50=1
always
always
In winter integration
In dehumidification or summer integration and if d01=1 or H30=1 or H33=1 or H35=1
In dehumidification or summer integration and if H35=1 or H53=1
Key:
1 Humidistat RH%
2 E/I switch
3 Winter
4 Summer
5 Winter thermostat °C
L7 LED status
flashing
fixed
flashing
fixed
flashing
fixed
flashing
flashing
fixed
fixed
fixed
flashing
fixed
fixed
21.10 – 5899000_03