CLIMAVENETA CVM 2 User manual

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
1
Summary
1 CONNECTIONS ..............................................................................................................................4
1.1 TEMPERATURE PROBES.............................................................................................................4
1.2 PRESSURE PROBES.......................................................................................................................5
1.3 LIVE DIGITAL INPUTS................................................................................................................6
1.4 RELAY OUTPUTS .......................................................................................................................6
1.5 SERIAL CONNECTIONS ..............................................................................................................7
1.6 KEYBOARD...................................................................................................................................7
1.7 REMOTE KEYBOARD..................................................................................................................7
1.8 POWER SUPPLY...........................................................................................................................8
2 SETUP................................................................................................................................................8
2.1 ACCESS TO PROGRAMMING.......................................................................................................8
3 SOFTWARE.....................................................................................................................................9
3.1 DESCRIPTION OF USER INTERFACE .........................................................................................9
3.2 UNIT STARTUP............................................................................................................................9
3.3 UNIT SHUTDOWN.....................................................................................................................10
3.4 ALARMS...................................................................................................................................10
3.4.1 Circuit and/or compressor alarms..............................................................................10
3.4.2 General alarms...............................................................................................................10
4 ALARM SIGNALS ........................................................................................................................11
5 HOW TO VISUALISE THE RESOURCE STATUS .................................................................13
5.1 VISUALISATION OF UNIT'S RESOURCE STATUS....................................................................13
6 REGULATION................................................................................................................................15
6.1 CHILLED WATER REGULATION.............................................................................................15
6.2 HOT WATER REGULATION.....................................................................................................15
7 PARAMETER LIST.......................................................................................................................16
8 ENCLOSURES ...............................................................................................................................23

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
2
Board description
The system consists of a main board which is located inside the electrical panel, and of a keyboard
(Enclosures fig. 1). The boards for the continuous adjustment of the fan speed are connected to the
main board. The keyboard communicates with the main board through a serial current-loop and
receive the power supply from the main board.
Figure 1-0 COMPLETE SYSTEM

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
3
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
Figure 1-1MAIN BOARD

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
4
1Connections
1.1 Temperature probes
The connected temperature probes are 3, or 4 in the case of water-water heat pumps with reversing cycle on the water side.
TERMINALS MEANING
1, 2 Inlet water temperature
3, 4 1st evaporator outlet water temperature
5, 6 2nd evaporator outlet water temperature (only with plate
heat exchangers)
7, 8 (only for water-water heat pumps
with reversing cycle on the water side) Condenser inlet water temperature
Temperature [°C] -55 -50 -40 -30 -20
Resistance [Ω]485 510 562 617 677
Temperature [°C] -10 010 20 25
Resistance [Ω]740 807 877 951 990
Temperature [°C] 30 40 50 60 70
Resistance [Ω]1029 1111 1196 1286 1378
Temperature [°C] 80 90 100 110 120
Resistance [Ω]1475 1575 1679 1796 1896
Temperature probes verification procedure:
•disconnect the power supply to the unit;
•disconnect the probe from microprocessor’s terminals;
•use a digital Ohmmeter to measure the resistance value of the probe;
•measure the temperature near the probe cap;
•compare the resistance value measured with the one shown in the table: the corresponding temperature must be
approximately the same as the measured one.

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
5
1.2 Pressure probes
There are two 4-20mA , 0-30 bar pressure probes for all the units, except for the water-water heat pumps with reversing cycle
on the water side.
TERMINALS MEANING
7, 8 1st circuit condensing pressure
9, 10 2nd circuit condensing pressure
Pressure [Bar] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Current [mA] 4.00 4.27 4.54 4.80 5.07 5.34 5.61 5.87
Pressure [Bar] 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
Current [mA] 6.14 6.41 6.68 6.94 7.21 7.48 7.75 8.01
Pressure [Bar] 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5
Current [mA] 8.28 8.55 8.82 9.08 9.35 9.62 9.89 10.15
Pressure [Bar] 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5
Current [mA] 11.43 10.69 10.96 11.23 11.49 11.76 12.03 12.30
Pressure [Bar] 16.0 16.5 17.0 17.5 18.0 18.5 19.0 19.5
Current [mA] 12.56 12.83 13.10 13.37 13.63 13.90 14.17 14.44
Pressure [Bar] 20.0 20.5 21.0 21.5 22.0 22.5 23.0 23.5
Current [mA] 14.70 14.97 15.24 15.51 15.77 16.04 16.31 16.58
Pressure [Bar] 24.0 24.5 25.0 25.5 26.0 26.5 27.0 27.5
Current [mA] 16.84 17.11 17.38 17.65 17.92 18.18 18.45 18.72
Pressure transducer verification procedure:
•switch off the compressors and leave the unit with only the “ON/OFF switch” button ON;
•disconnect the cable from terminal 7 or 9 of microprocessor, depending on the probe;
•place digital milliammeter between the disconnected terminal and the cable and read the current value;
•read the pressure value using a gauge placed near the transducer;
•compare the readings with the values shown in the table.

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
6
1.3 Live digital inputs
The following table shows the logic meaning of the AT digital inputs (230 Vac) and their arrangement:
TERMINALS MEANING
11, 12, 17 Common to all high voltage inputs
22 -AT1 Circuit 1 high pressure switch
16 -AT2 Circuit 2 high pressure switch
23 -AT3 Circuit 1 low pressure switch
15 –AT4 Circuit 2 low pressure switch
18 –AT5 Circuit 1 compressor thermal protection
14 –AT6 Circuit 2 compressor thermal protection
19 –AT7 Circuit 1 fans thermal protection
13 –AT8 Circuit 2 fans thermal protection
20 –AT9 Water differential pressure switch and external flow switch
21 –AT10 ON/OFF switch
1.4 Relay outputs
RELAY N.O. N.C. COM.
RL1 Cumulative alarm 41 39 40
RL2 Antifreeze 44
RL3 circuit 1 fan control 35 34
RL4 circuit 1 compressor control 43
RL5 circuit 2 compressor control 36 37
RL6 circuit 2 fan control 33
RL8 circuit 1 4-way valve control 46 47 45
RL9 circuit 2 4-way valve control 38
RL10 water pump control 42

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
7
LOCAL
REMOTE
1.5 Serialconnections
8-pin, TTL telephone-type connector.
1.6 Keyboard
It is connected to the following terminals, as indicated in the figure below:
KEYBOARD TERMINALS MAIN BOARD TERMINALS
428
329
131
232
Figure 1-1KEYBOARD CONNECTION
1.7 Remote keyboard
Figure 1-2REMOTE KEYBOARD CONNECTION
NB: The supplementary transformer is the 230/12 Vac transformer supplied with the remote keyboard kit.
The maximum length of the remote keyboard’s AWG24-type serial cable is 50 metres.
BASE CVM 2
112Vac 31
212Vac 32
3Current loop è29
4çCurrent loop 28
BASE CVM 2
112Vac 31
212Vac 32
3Loop è29
4çLoop
428
3
1 12Vac (from supplementary
transformer)
2 12Vac (from supplementary
transformer)

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
8
1.8 Power supply
The CVM 2 has a 230 Vac supply to terminals 49 and 50, phase and neutral respectively.
2Setup
2.1 Access to programming
Press the MENU key;
$The corresponding LED will light up and two fixed values will be displayed.
+Press the SET key;
$The parameter index (on the right-hand side of the display) will start flashing.
+Scroll through the parameter list using the “arrow up” and “arrow down” keys to visualise the required parameter.
+Press the SET key
$the value of the parameter (on the left-hand side of the display) will start flashing.
+Modify the value using the “arrow up” and “arrow down” keys.
+Press the SET key to confirm the operation.
+To access the FACTORY menu scroll through the list until parameter 92 appears, then enter the password.
+To exit, press the MENU key.
WARNING
To memorise the modifications and make them active you must turn off the power supply (using the main switch)
and, after a few seconds, turn it back on.

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
9
3Software
3.1 Description of user interface
If thePOWER LED is on, it means that the electronic control is supplied with power.
3.2 Unit startup
+Press the ON/OFF/RESET key.
$The inlet temperature value will be displayed on the screen.
+Press the MODE key.
•If the unit is a CHILLER:
$The COOLING LED comes on. The two COMPRESSOR 1and COMPRESSOR 2LED’s start flashing,
indicating the selection and stand-by condition required by the timer. Then they become steady, indicating operational
readiness, first of COMPRESSOR 1 and then of COMPRESSOR 2.
•If the unit is a HEAT PUMP:
$the HEATING LED comes on. The two COMPRESSOR 1and COMPRESSOR 2LED’s start flashing,
indicating the selection and stand-by condition required by the timer. Then they become steady, indicating operational
readiness, first of COMPRESSOR 1 and then of COMPRESSOR 2.
To modify the operating mode, press the MODE key; the unit will prepare for the change by shutting down the compressors
and then reactivating them in accordance with the procedure described above.

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
10
3.3 Unit shutdown
+Press the ON/OFF/RESET key.
$The display will go off.
3.4 ALARMS
There are two types of alarms: circuit/compressor and general alarms.
3.4.1 Circuit and/or compressor alarms
Visualisation of the circuit and compressor alarms.
The circuit and/or compressor alarms are visualised with the corresponding flashing code on the DISPLAY while the
ALARM LED comes on. The related compressor is simultaneously shut down.
Alarm reset:
+Press the ON/OFF/RESET key: the unit will be shut down.
3.4.2 General alarms
Visualisation of the general alarms
The general alarms are visualised with the corresponding flashing code on the DISPLAY while the ALARM LED comes on.
The compressors are simultaneously shut down.
Alarm reset:
+Press the ON/OFF/RESET key: the unit will be shut down.

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
11
4Alarm signals
Code ALARM Reset type Cause
E00 Remote off Automatic %Check the connection between
terminals 8 and 9.
E01 Circuit 1 high pressure Manual %Check the power supply to the
fans;
%Check if the condensing coils
are clean (Chiller);
%Check the water flow rate to
the evaporator (Heat pump).
E02 Circuit 1 low pressure Automatic %Check the flow rate to the
evaporator (Chiller);
%Check if the condensing coils
are clean (Heat pump).
E03 Compressor 1 thermal
protection Manual %Possible compressor motor
malfunction
E04 Circuit 1 fan thermal
protection Manual %Possible electric fan motor
malfunction
E05 Circuit 1 antifreeze Manual %Check the water flow rate to
the evaporator;
%Check the operation of the
water pump;
%Verify if cold set point is
correct (parameters: 2, 58, 59).
E06 ST2 probe malfunction Automatic %Check the connections to
board terminals 3 and 4;
%Probe malfunction.
E07 ST5 probe malfunction Automatic %Check the connections to
board terminals 7 and 8;
%Probe malfunction.
E21 Circuit 2 high pressure Manual %Check the power supply to the
fans;
%Check if the condensing coils
are clean (Chiller);
%Check the water flow rate to
the evaporator (Heat pump).

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
12
E22 Circuit 2 low pressure Automatic %Check the water flow rate to
the evaporator (Chiller)
%Check if the condensing coils
are clean (Heat pump).
E23 Compressor 2 thermal protection Manual %Possible compressor motor
malfunction.
E24 Circuit 2 fan thermal protection Manual %Possible electric fan motor
malfunction.
E25 Circuit 2 antifreeze Manual %Check the water flow rate to
the evaporator;
%Check the operation of the
water pump;
%Verify if cold set point is
correct (parameters: 2, 58, 59).
E26 ST3 probe malfunction Automatic %Check the connections to
board terminals 5 and 6;
%Probe malfunction.
E27 ST6 probe malfunction Automatic %Check the connections to
board terminals 9 and 10;
%Probe malfunction.
E40 ST1probe malfunction Automatic %Check the connections to
board terminals 1 and 2;
%Probe malfunction.
E41 Water differential pressure
switch (external flow switch) Automatic %Check the water flow rate to
the evaporator;
%Purge the air from the water
side;
%Possible pressure switch
malfunction.

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
13
5How to visualise the resource status
5.1 Visualisation of the unit’s resource status
+Press the STATUS key.
$The STATUS LED comes on. The resource index appears on the left-hand side of the DISPLAY, while the
corresponding status appears on the right-hand side.
+Press the “arrow up” and/or “arrow down” key to scroll through the list.
Index Resource Meaning
01 Compressor 1 01 summer cycle operation
02 winter cycle operation
03 defrost operation
04 delay on compressor start
06 compressor off
02 Compressor 1 hours Operating hours since last operating hours reset
03 Circuit 1 fans 01 operating
02 off for defrosting
06 fans off
04 Circuit 1 defrosting -- not present
01 defrosting
02 compressor 1 safety count
03 defrosting time count
04 active defrosting delays
06 inactive
05 Fan module outlet 1 0 -100%
21 Compressor 2 -- not present
01 summer cycle operation
02 winter cycle operation
03 defrost operation
04 delay on compressor start
06 compressor off
22 Compressor 2 hours -- not present
Compressor operating hours since last time reset
23 Circuit 2 fans -- not present
01 operating
02 off for defrosting
06 fans off
24 Circuit 2 defrosting -- not present
01 in progress
02 compressor 1 safety count
03 defrosting time count
04 active defrosting delays
06 inactive

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
14
25 Fan module outlet 2 --- not present
0 -100%
40 ST1 inlet water temperature --- probe not present
value in °C/10
ERR probe error
41 Remote ON/OFF status --- not present
ON contact closed
OFF contact open
42 Outlet temperature of 1st ST2
evaporator --- probe not present value in °C/10
ERR probe error
43 Outlet temperature of 2nd ST3
evaporator --- probe not present value in °C/10
ERR probe error
44 Condensing water inlet
temperature reading for unit
with reversing cycle on water
side
ST5 or condensing pressure
reading for unit with fans speed
regulation SP5
--- probe not present
value in °C/10
ERR probe error
45 Condensing pressure reading for
unit with fans speed regulation
SP5
--- probe not present
value in °C/10
ERR probe error
46 Water pump status --- pump not present
01 pump on
06 pump off
47 Water pump hours --- pump not present
Number of hours counted since the last time reset
48 Antifreeze heater --- heater not present
01 heater on
06 heater off

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
15
6Regulation
6.1 Chilled water regulation
+To modify the working set point of the unit in Chiller mode, modify the value of parameter 2, following the
parameter access procedure described above (chap. 2).
N° of parameters Default value
2 Chiller set point 12 °C
4 Chiller differential 1 °C
48 ∆t2 °C
NB: regulation is made based on the temperature reading at the evaporator inlet.
6.2 Hot water regulation
To modify the working set point of the unit in Heat Pump mode, modify the value of parameter 3, following the parameter
access procedure described above (chap. 2).
N° of parameters Default value
3 Heat pump Set Point 40 °C
5 Heat pump differential 1 °C
48 ∆t2 °C
NB: regulation is made based on the temperature reading at the condenser inlet.

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
16
7Parameter list
= USER PARAMETERS
M = UNIT PARAMETERS
CI = CIRCUIT PARAMETERS
CO = COMPRESSOR PARAMETERS
N. TYPE UNIT PARAMETERS RANGE DEFAUL
T
1MTYPE OF UNIT 0↔5Tab. 7-1
Value Description
0Water-air chiller
1Water-water chiller
3Water-air heat pump
5Water-water heat pump with reversing cycle on liquid side
Table 7-1UNIT TYPE’
2MCOLD SET POINT (COOLING) p.58↔p.59 120
°C/10
3MWARM SET POINT (HEATING) p.60↔p.61 400
°C/10
4MCOOLING DIFFERENTIAL 0↔126 10
°C/10
5MHEATING DIFFERENTIAL 0↔126 10
°C/10
Figure 7-1REGULATION IN CHILLER MODE
CHILLER OPERATION
DIFFERENTIAL p.4
SUMMER SET
p.2 TEMPERATURE
COMPRESSORS
2°
1°
∆t p.48
DIFFERENTIAL p.4

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
17
Figure 7-2HEAT PUMP REGULATION
6MSUMMER FAN SPEED MINIMUM PRESSURE 0↔30 14 Bar
7MSUMMER FAN SPEED MAXIMUM PRESSURE 0↔30 19 Bar
8MWINTER FAN SPEED MINIMUM PRESSURE 0↔30 5 Bar
9MWINTER FAN SPEED MAXIMUM PRESSURE 0↔30 4 Bar
10 MCIRCUIT No. 1 FAN OPERATING MODE 0=MODULATING
OUTPUT
1=ON/OFF
2=DISABLED
0 num.
11 MCIRCUIT No. 2 FAN OPERATING MODE 0= MODULATING
OUTPUT
1=ON/OFF
2=DISABLED
0 num.
12 MMODULATING OUTPUT LOWER LIMIT 0↔100 30 %
13 MMODULATING OUTPUT UPPER LIMIT 0↔100 100 %
14 MSUMMER CUT-OFF SET POINT 0↔30 13 Bar
15 MWINTER CUT-OFF SET POINT 0↔30 6 Bar
16 MRESTART AT 100%: 0=W/OUT
CURRENT PEAK
1=WITH CURRENT
PEAK
1 flag
17 MCUT-OFF BY-PASS TIME 0↔126 30 sec
18 MFAN PEAK CURRENT TIME 0↔126 30 sec
19 MFAN START MODE 0=ON REQUEST
1=CONTINUOUS 1 flag
COMPRESSORS
HEAT PUMP OPERATION
DIFFERENTIAL p.5
WINTER SET
p.3
2°
1°
∆t p.48
DIFFERENTIAL p.5
TEMPERATURE

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
18
Figure 7-3FANS SPEED REGULATION IN CHILLER MODE
Figure 7-4FANS SPEED REGULATION IN HEAT PUMP MODE
20 MDEFROST START PRESSURE 0↔30 30 Bar
21 MDEFROST END PRESSURE 0↔30 140 Bar
22 MDEFROST STAND-BY TIME 0↔126 30 min
23 MMAXIMUM DEFROST TIME 0↔126 5 min
24 MDELAY BETWEEN FIRST CIRCUIT END OF
DEFROST AND SECOND CIRCUIT START
DEFROST
0↔126 2 min
25 MFORCED VENTILATION PRESSURE DURING
DEFROST 0↔30 16 Bar
CHILLER OPERATING MODE VENTILATION
FAN SPEED
MAXIMUM p.7
MINIMUM p.6
CUT-OFF + DELTA
CUT-OFF p.14
MINIMUM p.12 MAXIMUM p.13
PRESSURE [Bar]
HEAT PUMP OPERATING MODE VENTILATION
FAN SPEED
MAXIMUM p.9
MINIMUM p.8
CUT-OFF -DELTA
CUT-OFF p.15
MINIMUM p.12 MAXIMUM p.13
PRESSURE [Bar]

TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
19
26 MANTIFREEZE ALARM SET p.62↔p.63 30
°C/10
27 MANTIFREEZE HYSTERESIS 0↔126 40
°C/10
28 MANTIFREEZE RESET TYPE 0=AUTOMATIC
1=MANUAL 1 flag
29 MANTIFREEZE ALARM BY-PASS CONFIGURATION
(E05/E25) FOR CIRCUIT 1 AND 2 0=NEVER 1=HEAT
2=COOL
3=ALWAYS
1 num.
31 MANTIFREEZE BY-PASS TIME 0↔255 30 sec
32 MANTIFREEZE HEATER START SET POINT -280↔500 30
°C/10
33 MANTIFREEZE HEATER START HYSTERESIS 0↔126 40
°C/10
38 MFAN MOTORS PHASE ANGLE VALUE 0↔126 5 num.
39 MWATER PUMP OPERATING MODE 0=NOT PRESENT
1=CONTINUOUS
2=ON REQUEST BY
THERMO-
REGULATOR
1 num.
40 MCOMPRESSOR START DELAY AFTER PUMP
START 0↔126 60 sec
41 MPUMP SHUTDOWN DELAY AFTER
COMPRESSOR SHUTDOWN 0↔126 60 sec
42 MDIFFERENTIAL PRESSURE SWITCH AND
EXTERNAL FLOW SWITCH ALARM BY-PASS
(E41) UPON PUMP START
0↔126 30 sec
43 MDIFFERENTIAL PRESSURE SWITCH AND
EXTERNAL FLOW SWITCH ALARM RESET BY-
PASS (E41)
0↔126 10 sec
44 CO TYPE OF RESET OF COMPRESSOR THERMAL
PROTECTION ALARM (E03/E23) 0=AUTOMATIC 1=MANUAL 1 flag
45 CI TYPE OF RESET OF FAN THERMAL
PROTECTION ALARM (E04/E24) 0=AUTOMATIC 1=MANUAL 1 flag
46 CO COMPRESSOR THERMAL PROTECTION ALARM
BY-PASS TIME (E03/E23) 0↔126 1 sec
47 MTEMPERATURE UNIT OF MEASUREMENT 0=CELSIUS
1=FAHRENHEIT 0 flag
48 M∆t0↔126 20
°C/10
49 MSAFETY TIME BETWEEN COMPRESSOR START
AND SHUTDOWN 0↔126 6 sec x10
50 MSAFETY TIME BETWEEN 1st AND 2nd
COMPRESSOR START 0↔126 36 sec x10

TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
20
51 CI LOW PRESSURE BY-PASS TIME IN HEAT PUMP
MODE FOR CIRCUITS 1 AND 2 0↔255 120 sec
52 CI LOW PRESSURE BY-PASS TIME IN CHILLER
MODE FOR CIRCUITS 1 AND 2 0↔255 120 sec
53 MDELAY BETWEEN 1st AND 2nd COMPRESSOR
START 0↔126 10 sec
54 MDELAY BETWEEN 1st AND 2nd COMPRESSOR
SHUTDOWN 0↔126 5 sec
55 MCOMPRESSORS AVAILABLE ON SET POINT 0↔22 num.
56 CI CIRCUIT 1 CONFIGURATION 0↔2Tab. 7-2
57 CI CIRCUIT 2 CONFIGURATION 0↔2Tab. 7-2
Parameter value Meaning
0NO COMPRESSOR
11 COMPRESSOR
2NOT USED
Table 7-2CIRCUIT CONFIGURATION
58 MSUMMER SET POINT LOWER LIMIT (CHILLER) -20↔p.2 10 °C
59 MSUMMER SET POINT UPPER LIMIT (CHILLER) p.2↔50 20 °C
60 MWINTER SET POINT LOWER LIMIT (HEAT
PUMP) -10↔p.3 30 °C
61 MWINTER SET POINT UPPER LIMIT (HEAT PUMP) p.3↔60 50 °C
62 MLOWER ANTIFREEZE SET POINT LIMIT -28↔p.26 3 °C
63 MUPPER ANTIFREEZE SET POINT LIMIT p.26↔60 10 °C
64 CI 4-WAY VALVE 0=ABSENT (p.1=0-1)
1=PRESENT (p.1=3,
5)
-- flag
65 CI 4-WAY VALVE POLARITY 0=RELAY ON IN
CHILLER MODE
1=RELAY ON IN
HEAT PUMP MODE
1 flag
66 MDEFROST 0=SEPARATE
1=SIMULTANEOUS -- flag
67 MMODE KEY CONFIGURATION 0=COOL/STAND-
BY 1=MULTIPLE
(HEAT/COOL/ST-
BY)
1 flag
68 MOPERATING MODE FROM REMOTE ON
(MAINTAINS THE PREVIOUS STATUS UPON
SHUTDOWN FROM REMOTE UNIT)
0=CHILLER
1=PUMP 2=STAND-
BY
2 num.