Compatible Devices
Cruisair Tempered Water Controller [g3-cruisai...controller | Word]
Verified Device
Cruisair Tempered Water Controllers in network [g3-cruisai...controller | Word]
Driver Options
-
Maximum Response Time
- Must be increased when multiple chillers are used
- Recommended starting value = 1000 × number of chillers
- Higher values:
- Increase timeout tolerance
- Increase update time if a chiller is missing [g3-cruisai...controller | Word]
Port Settings
- Must remain:
- 4800 baud
- 8 data bits
- No parity
- 1 stop bit [g3-cruisai...controller | Word]
Device Options
- Each chiller requires:
- A separate Device entry
- A unique ID from 1–6
- Numbers correspond to the Cruisair display chiller numbers [g3-cruisai...controller | Word]
Configuration Overview
Selections are grouped into:
- Chiller Status
- Faults and Fault History
- Input/Output Logs
- Global Parameters
- Global Control [g3-cruisai...controller | Word]
Special Feature – PGEN
- Allows execution of generic commands
- Range:
-
0–999→ global command -
1000–1999→ chiller 1 -
2000–2999→ chiller 2 - etc.
-
✔ Enables adding new commands without driver updates [g3-cruisai...controller | Word]
Accessible Data
Chiller Status
| Prefix | Description | Access |
|---|---|---|
| CSN | Current stage number | Read Only |
| LFS | Loop water flow switch | Read Only |
| SVN | Software version | Read Only |
| SIT | Seawater inlet temp | Read Only |
| SOT | Seawater outlet temp | Read Only |
| LST | Loop supply temp | Read Only |
| LRT | Loop return temp | Read Only |
| LFT | Loop freeze temp | Read Only |
| RLP | Low pressure | Read Only |
| RHP | High pressure | Read Only |
| LPR | Loop pressure | Read Only |
| SPR | Seawater pressure | Read Only |
| CCU | Compressor current | Read Only |
| SPC | Seawater pump current | Read Only |
| LPC | Loop pump current | Read Only |
| ACV | AC voltage | Read Only |
| CRT | Compressor run time | Read Only |
| MODE | Operating mode | Read Only |
Control Actions (Execute when non-zero)
- TGR → Toggle rotate
- ISN / DSN → Increment/Decrement stage
- TGC → Toggle chiller
- C1LG / C1FH / C1IO → Clear logs/history/I/O [g3-cruisai...controller | Word]
Faults and Fault History
| Prefix | Description |
|---|---|
| FCN | Number of faults |
| FAB | Active fault bits |
| ACL | Low AC voltage faults |
| FSW | Flow switch faults |
| HDS | High discharge faults |
| LLT | Loop low temp faults |
| LHT | Loop high temp faults |
| FCT | Total fault count |
…and many additional detailed fault counters [g3-cruisai...controller | Word]
Input / Output Log
| Prefix | Description |
|---|---|
| SPN | Min suction pressure |
| DPX | Max discharge pressure |
| CCX | Max compressor current |
| ACLN | Min AC voltage |
| ACLX | Max AC voltage |
| LSTN | Min supply temp |
| LSTX | Max supply temp |
| SITN | Min seawater in temp |
| SITX | Max seawater in temp |
(All values are read-only) [g3-cruisai...controller | Word]
Global Parameters
| Prefix | Description | Access |
|---|---|---|
| HSP | Heating setpoint | Configured by stage |
| CSP | Cooling setpoint | Configured by stage |
| LFLT | Loop freeze limit | Read/Write |
| LHLT | Loop high limit | Read/Write |
| SPL | Suction pressure limit | Read/Write |
| DPL | Discharge pressure limit | Read/Write |
| CRD | Compressor restart delay | Read/Write |
| ERD | Error retry delay | Read/Write |
| NET | Network status | Read Only |
| PGEN | Generic command | Special |
✔ Recommended to configure on Chiller 1 [g3-cruisai...controller | Word]
Global Control
Write non-zero values to execute:
| Prefix | Function |
|---|---|
| SOFF | Turn off |
| COOL | Cooling mode |
| HEAT | Heating mode |
| BOTH | Cooling + Heating |
| RESH | Resistance heat |
| FAHR / CENT | Units |
| INIT | Initialize |
| RDEF | Restore defaults |
| CALL | Clear logs |
| CAFH | Clear faults |
| CAIO | Clear I/O limits |
- Reads return 0
- BUZZ returns special value for ON/OFF [g3-cruisai...controller | Word]
Notes
- Headers are not programmable (used for grouping only)
- Global items should be assigned to Device 1 for best response
- Writes are not validated by driver
- Programmer must ensure valid values [g3-cruisai...controller | Word]
Application Optimization (Multi-Chiller Systems)
Recommended logic:
C
for(i = 0; i < 6; i++) {
if(i < Chiller_Count)
EnableDevice(i);
else
DisableDevice(i);
}
✔ Reduces scan/update time by disabling unused chillers [g3-cruisai...controller | Word]
Cable Information
Place Photo Here
RS-232 Only
(Cruisair ↔ G3 connection)
Summary
This driver is built around:
- Multi-chiller architecture (1–6 devices)
- Heavy use of grouped data (status, faults, logs, globals)
- Command execution via non-zero writes
- Flexible extension via PGEN
👉 Key thing:
You control individual chillers + global system behavior simultaneously, which is why device numbering and scan timing matter a lot.
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