Operating instructions

93
Table 59 — Alarm Codes (cont)
LEGEND
PREFIX
CODE
SUFFIX
CODE
ALARM
NUMBER
ALARM DESCRIPTION REASON FOR ALARM
ACTION TAKEN
BY CONTROL
RESET
TYPE
PROBABLE CAUSE
P 34 88 Circuit A Reclaim Operation
Failure
— None Manual Configuration error
35 89 Circuit B Reclaim Operation
Failure
37 90 Circuit A — Repeated high
discharge gas overrides
Multiple capacity over-
rides due to high
saturated discharge
temperature
Circuit shut down Automatic Condenser air
recirculation, dirty or
plugged condenser
coils, inaccurate
discharge transducer,
faulty condenser fan
38 91 Circuit B — Repeated high
discharge gas overrides
39 92 Circuit C — Repeated high
discharge gas overrides
40 93 Circuit A — Repeated low
suction temp overrides
Multiple capacity
overrides due to low satu-
rated suction temperature
Circuit shut down Automatic Inaccurate
transducer, faulty EXV,
low refrigerant charge,
plugged or restricted
liquid line filter drier.
41 94 Circuit B — Repeated low
suction temp overrides
42 95 Circuit C — Repeated low
suction temp overrides
43 96 Low entering water tempera-
ture in heating
Not supported — — —
73 97 Condenser pump #1 default — None Manual Configuration error
74 98 Condenser pump #2 default
78 99 Circuit A High Discharge
Temperature
Discharge gas tempera-
ture is higher than 212 F
(100 C) for more than
90 seconds
Circuit shut down Manual Faulty transducer/high
pressure switch, low/
restricted condenser
flow
79 100 Circuit B High Discharge
Temperature
80 101 Circuit C High Discharge
Temperature
81 102 Circuit A Low Economizer
Pressure
The economizer pressure
is below the suction pres-
sure more than 14.5 psi
for more than 10 seconds
Circuit shut down Manual Faulty transducer,
faulty main base board,
faulty wiring, closed
suction service valve,
faulty EXV
82 103 Circuit B Low Economizer
Pressure
83 104 Circuit C Low Economizer
Pressure
87 105 Circuit A Slide Valve Control
Unverifiable
If 100% load current is
less than 1.1 times of 30%
load current, or for 1 min-
ute when active cooling
setpoint is greater than
32 F (0°C).
None Manual Slide valve stuck, inac-
curate initial current
reading
88 106 Circuit B Slide Valve Control
Unverifiable
89 107 Circuit C Slide Valve Control
Unverifiable
90 108 Cooler flow switch set point
configuration failure
— None Manual Configuration error
91 109 Cooler flow switch failure Flow switch open Unit shut down Manual if unit
is running,
automatic
otherwise
Faulty flow switch, low
cooler flow, faulty
wiring, faulty cooler
pump, faulty main base
board, minutes off time
set to 0
97 127 Water Exchanger Tempera-
ture Sensors Swapped
Control detects EWT
below LWT for 1 minute
Unit shut down Manual Wiring error, EWT and
LWT sensors swapped
Sr nn 110 Service maintenance alert
Number # nn
Field programmed
elapsed time has expired
for maintenance time
None Manual Maintenance required
A1, B1, C1 01 111-01,
112-01,
113-01
Compressor Motor tempera-
ture too high
Compressor temperature
higher than 232 F (111 C)
for more than 90 seconds
Circuit shut down Manual Motor cooling solenoid
or economizer
(080,082 only) EXV
failure, faulty CPM
board, low refrigerant
charge (090-500)
02 111-02,
112-02,
113-02
Compressor Motor tempera-
ture out of range
Compressor temperature
reading out of the range of
–40 F to 245 F
(–40 C to 118 C)
Circuit shut down Manual Faulty thermistor, faulty
wiring, faulty CPM
board
03 111-03,
112-03,
113-03
Compressor High pressure
switch protection
HPS input on CPM board
open
Circuit shut down Manual, press
reset button on
HPS
Loss of condenser air
flow, operation beyond
compressor envelope,
faulty high pressure
switch, faulty wiring,
faulty CPM board
CCN — Carrier Comfort Network® HPS — High Pressure Switch
CPM — Compressor Protection Module LWT — Leaving Water Temperature
DX — Direct Expansion MOP — Maximum Operating Pressure
EMM — Energy Management Module MTA — Must Trip Amps
EWT — Entering Water Temperature OAT — Outdoor Air Temperature
EXV — Electronic Expansion Valve SST — Saturated Suction Temperature
HGBP — Hot Gas Bypass UL — Underwriters Laboratories