JOHNSON CONTROLS
192
FORM 150.67-NM2
ISSUE DATE: 01/31/2019
SECTION 10 – MAINTENANCE
TABLE 40 - ISN OPERATIONAL AND FAULT CODES
P56/58 Operational Code P57/59 Fault Code
0 No Abnormal Condition 0 No Fault
1 Unit Switch Off 1 VAC Under Voltage
2 System Switch Off 2 Low Ambient Temperature
3 Lock-Out 3 High Ambient Temperature
4 Unit Fault 4 Low Leaving Chilled Liquid Temp
5 System Fault 5 High Discharge Pressure
6 Remove Shutdown 6 High Differential Oil Pressure
7 Daily Schedule Shutdown 7 Low Suction Pressure
8 No Run Permissive 8 High Motor Current
9 No Cool Load 9 LLSV Not On
10 Anti-Conicidence Timer Active 10 Low Battery Warning
11 Anti-Recycle Timer Active 11 High Oil Temperature
12 Manual Override 12 High Discharge Temperature
13 Suction Limiting 13 Improper Phase Rotation
14 Discharge Limiting 14 Low Motor Current Unbalanced
15 Current Limiting 15 Motor Current / MP / HPCO
16 Load Limiting 16 Low Differential Oil Pressure
17 Compressor(s) Running 17 Ground Fault
18 Heat Pump Load Limiting 18 MP / HPCO
19 Low Evaporator Temperature
20 Incorrect Refrigerant Programmed
21 Required Power Failure, Manual Reset
22 Unit Motor Current
23 Low Superheat
24 Sensor Fail
25 Discharge Inhibit
26 MP/HPCO Inhibit
27 Pump Trip
28 Pump Fail Make Flow
* The operational and fault codes sent to ISN pages 56 through 59 are dened in Table 39. Note that this table of fault and operational codes is
for all DX products.
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