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