35
ALARM CODE DESCRIPTIONS (cont.)
Alarm Description Why was this alarm Action taken Reset type Probable cause
code generated? by the control
82 Communication loss with the 4 x DO heat reclaim board 4 x DO board does not respond Unit shut down Automatic Defective bus wiring, incorrect address or
defective board
83 Heat reclaim mode fault, circuit A 1. Interlock not closed 1 minute after Circuit A remains in cooling Manual 1. Water flow switch defective.
condenser pump start-up or open mode 2. Leak or heat reclaim shutoff or drain
during heat reclaim operation solenoid valve open.
2. More than two consecutive
pumpdown sequences not successful.
84 Heat reclaim mode fault, circuit B Ditto Circuit B remains in cooling Manual Ditto
mode
Alarm code
1xx Defect compressor A1 See CPM subcodes below See CPM subcodes below Manual
2xx Defect compressor A2 See CPM subcodes below See CPM subcodes below Manual
3xx Defect compressor B1 See CPM subcodes below See CPM subcodes below Manual
4xx Defect compressor B2 See CPM subcodes below See CPM subcodes below Manual
CPM subcodes (XX)
01 High pressurestat tripped HPS port to CPM module open Compressor shut down Manual Lack of condenser water flow. Condenser
valve blocked, fan circuit fault, high
condenser entering air or water temperature
02 No motor current CPM module shows less than 10% Compressor shut down Manual Power supply interrupted, fuse(s) blown,
of the MTA for more than 3 seconds wiring fault, core defective
03 Current imbalance >10% CPM shows the voltage imbalance Compressor shut down, if Manual, if threshold Loss of power supply, wiring fault,
between phases as more than 10% threshold alarm is validated. alarm is validated. loose terminal, core defective
for 25 minutes Otherwise simple message. Otherwise
automatic reset.
04 Current imbalance >18% CPM shows the voltage imbalance Compressor shut down, if Manual, if threshold Poor power supply, loose terminal,
between phases as more than 18% threshold alarm is validated. alarm is validated. core defective
for 25 minutes Otherwise simple message. Otherwise
automatic reset.
05 Current drop in one phase CPM shows the current imbalance Compressor shut down Manuel Motor fault, wiring fault
between phases as more than 30%
for 1.8 seconds
06 High motor current CPM detects high current, based Compressor shut down Manuel Operation outside the compressor capacity.
on MTA rating Configuration block badly perforated, motor
fault
07 Ground current fault CPM detects ground current Compressor shut down Manuel Ground current fault on motor winding,
(2.5 +2/- 0 amps) wiring fault
08 Voltage imbalance >3% CPM shows the voltage imbalance Compressor shut down, if Manual, if threshold Compressor fault, power supply imbalance,
between phases as more than 3% threshold alarm is validated. alarm is validated wiring fault, loose terminal
for 25 minutes Otherwise simple message. Otherwise
automatic reset.
09 Voltage imbalance >7% CPM shows the voltage imbalance Compressor shut down, if Manual, if threshold Ditto
between phases as more than 3% threshold alarm is validated. alarm is validated.
for 25 minutes Otherwise simple message. Otherwise
automatic reset.
11 Voltage phase reversal CPM detects phase reversal in The compressor does not start Manual Supply phases or cables reversed,
the incoming power supply reference voltages reversed on the CPM
board, after replacement
12 Contactor failure CPM detects 10% of the MTA Unit shut down Manual Defective/blocked contactor
for 10 seconds after shutdown
of the compressor contactor.
Oil solenoid still has supply.
13 Current phase reversal CPM detects a current phase reversal Compressor shut down Manual Supply phases or cables reversed,
via the core core wiring reversed after replacement
14 High motor temperature CPM detects high motor Compressor shut down Manual Solenoid, cooling motor defect, low
temperature, if temperature is refrigerant charge. Wiring, motor
higher than 110°C for 10 seconds temperature sensor or CPM board fault
15 Motor thermistor open CPM detects an open circuit at Compressor shut down Manual Wiring fault, thermistor or board defective
the motor temperature thermistor
16 Configuration block fault CPM detects a reading fault at Compressor shut down Manual Configuration block on CPM board badly
the block perforated or badly placed. Defective board.
17 Thermistor short-circuited CPM detects a short circuit at Compressor shut down Manual Wiring fault, thermnistor or board defective
the motor temperature thermistor
Legend:
* Defrost threshold = 1,1°C for water or for the lowest cooling setpoint less 4,4°C for brine or low brine.
CPM: Compressor protection module
FSM: Flotronic System Manager
TM
CSM: Chiller System Manager
MTA: Compressor Must Trip Amperes
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