Carrier PRO-DIALOG Plus 30GK Series Installation, Operation & Maintenance Instructions Manual page 34

ALARM CODE DESCRIPTIONS
Code Alarm name
49 Low suction overheat, circuit B
50 Low oil pressure, compressor A1
51 Low oil pressure, compressor B1
52 Low oil pressure, compressor A2
53 Low oil pressure, compressor B2
54 Low oil pressure, compressor A3
55 Low oil pressure, compressor B3
56 Low oil pressure, compressor A4
57 Low oil pressure, compressor B4
58 Evaporator water flow control fault
59 Low pressure fault, circuit A
60 Low pressure fault, circuit B
61 Repeated high pressure load sheds, circuit A
62 Repeated high pressure load sheds, circuit B
63 High pressure switch not reset or reverse compressor
rotation, circuit A
64 High pressure switch not reset or reverse compressor
rotation, circuit B
65 Control box thermostat fault
66 Loss of communication with System Manager
67 Loss of communication with the master or slave
68 Master/slave configuration error
69 Initial factory configuration necessary
70 Poor factory configuration.
1. Compr. A3 configured and A2 absent
2. Compr. A4 configured and A2 or A3 absent
3. No lead compr. in circuit B
4. Compr. B3 configured and B2 absent
5. Compr. B4 configured and B2 or B3 absent
6. Difference of compressors in circ. A and B too high
7. Fan configured for a water-cooled condenser
8. No fans configured
9. Heat reclaim option configured, and heat reclaim
sensors not configured
71 CCN/Clock Board fault
72 Emergency stop
73 Pump No. 1 fault
74 Pump No. 2 fault
75 Condenser anti-freeze protection, circuit A
76 Condenser anti-freeze protection, circuit B
77 Lack of water flow, condenser
78 Condenser water flow fault, heat reclaim mode
79 Heat reclaim mode fault, circuit A
80 Heat reclaim mode fault, circuit B
81 High pressure fault, circuit A
82 High pressure fault, circuit B
83 Maintenance alert
1. Charge too low
2. Water loop too low
3. Air filter maintenance delay elapsed
4. Pump 1 maintenance delay elapsed
5. Pump 2 maintenance delay elapsed
6. Water filter maintenance delay elapsed
34
Description Action
Circuit B shut down
Oil pressure < min. threshold Circuit A shut down
Ditto Circuit B shut down
Ditto Compressor A2 shut down
Ditto Compressor B2 shut down
Ditto Compressor A3 shut down
Ditto Compressor B3 shut down
Ditto Compressor A4 shut down
Ditto Compressor B4 shut down
1. Interlock not closed before end Unit shut down.
of start-up delay Pump shut down
2. Pump shut down for 2 mins
and water flow contact closed
Circuit operating, and suction pressure Circuit A shut down
below permitted threshold for more
than 3 mins.
Ditto Circuit B shut down
More than 6 successive capacity load None
sheds in the circuit due to exceeded
high pressure
Ditto Ditto
The high pressure switch has not been Circuit A shut down
reset after a high pressure cut-out,
or the lead compressor does not work
Ditto Circuit B shut down
Sensor overheat Unit shut down
Units controlled by SM, and Unit operates in autonomous mode
communication with the module over
2 mins. faulty
Master/slave connection interrupted Unit operates in autonomous mode
beween the two units for more than
2 mins.
Poor master/slave configuration Master/slave control not allowed
All factory parameters are at zero Unit prevented from starting
Poor factory configuration Ditto
The CCN/Clock Board is no longer Unit shut down
detected
An emergncy stop commend has been Unit shut down
transmitted by the CCN network.
Evaporator water pump operating Unit shut down
contact open, when the pump has
received a commmand to operate.
Ditto Unit shut down
Saturated temperature is under the Unit shut down. Condenser pump
frost cut-out point started, if unit is shut down
Ditto Ditto
Water flow switch (water-cooled units) Unit shut down
not closed for 1 min.
Ditto Units stays in cooling mode
More than two consecutive pumpdown Circuit A stays in cooling mode
sequences not successful
Ditto Circuit B stays in coolng mode
Circuit operating and discharge pressure Unit shut down
exceeds the high pressure cut-out point
Ditto Ditto
A maintenance alert is active None
Pumpdown Reset type Probable cause
Yes Manual Ditto
No Manual Compressor, crankcase
heater, pressure sensor or
EXV faulty, refrigerant
charge too high, low oil
charge
No Manual Ditto
Manual Ditto
Manual Ditto
Manual Ditto
Manual Ditto
Manual Ditto
Manual Ditto
No Manual Evaporator water flow fault
No Auto first time, Low refrigerant charge, EXV
then manual* faulty or filter dirty
No Ditto Ditto
No Auto Transducer faulty, condenser
ent. air temp., evaporator ent.
water temp. too high, cond.
blocked or fan flow rate too
low
Ditto Ditto
No Manual The high pressure switch has
not been reset, poor electrical
connection of lead compr.
No Manual Ditto
Manual Control box poorly
ventilated
Auto CCN network fault
Auto CCN network fault
Auto/manual in Master/slave configuration
case of heating/ fault
cooling fault
Auto No factory configuration
Ditto Factory configuration error
No Auto, if the board CCN/Clock Board faulty
is again detected
No CCN CCN network command
No Manual Pump overheat or poor
pump connection
No Manual Ditto
No Auto Discharge pressure trans-
ducer faulty, refrigerant leak,
or low cond. water temp.
No Auto Ditto
No Manual Condenser pump, low water
flow, water flow switch
No Manual Ditto
No Manual Leak or heat reclaim or drain
solenoid shut-off valve fault
No Manual Ditto
No Manual, the high Fan circuit fault, air or
pressure command condenser temperature too
must be reset high
manually by the
button on the HP
pressure switch
No Ditto Ditto
Manual