Figure 4.13 Alarm Troubleshooting Sequence - Carrier 69NT40-561-019 Operation And Service Manual

CODE # TITLE
Evaporator Fan
Pulsing
Cd60
Temperature
Setting
Start
Troubleshooting
Unit does
self test?
Did
Evaporator
fans start?
Correct
software
version?
Unit
configured
correctly?
Active
Alarms?
Pass
Pre--trip
inspection?
Operating
pressures
normal?
Unit OK
T-359
Table 4–5 Controller Function Codes (Continued)
CD60 contains a selectable temperature range used to determine the engagement
point of the Evaporator Fan Pulsing logic. Default setting is -18.1°C. The user may
change the temperature by pressing enter, then scrolling to the desired temperature
using either arrow key. Press Enter to accept the change. The temperature setting
will be retained until either a Pretrip or Trip Start is initiated at which time the tempera-
ture will set to the default setting.

Figure 4.13 Alarm Troubleshooting Sequence

No
Check Power
Supply
Yes
No
Check Power
Supply
Yes
No
Install Latest
Software
Revision
Yes
Load correct
No
configuration
Yes
See alarm
Yes
details &
No
No
Correct
all faults
Yes
No
Correct
Refrigerant
Yes
DESCRIPTION
Refer to CONNECT POWER
Section 5.2
Refer to CONNECT POWER
Section 5.2
Refer to CONTROLLER SOFTWARE
Section 4.2
Refer to Configuration Software (Variables)
unit
Section 4.2.1
Refer to Controller Alarm Indications
Table 4–6
repair
Refer to Pre--trip Diagnostics
Section 4.6
Refer to REFRIGERATION SYSTEM
Section 7.3
issue
4–30