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2SP H/C and 3 Speed Fan Operation
FAN TYPE = 2SP H/C and FAN TYPE = 3SPEED are not
used on 549K units.
CHECKOUT
Inspect all wiring connections at the economizer module's termi-
nals, and verify compliance with the installation wiring diagrams.
For checkout, review the Status of each configured parameter and
perform the Checkout tests.
NOTE: For information about menu navigation and use of the
keypad, see Interface Overview on page 40.
Power Up
After the W7220 module is mounted and wired, apply power.
Initial Menu Display
On initial start up, Honeywell displays on the first line and econo-
mizer W7220 on the second line. After a brief pause, the revision
of the software appears on the first line and the second line will be
blank.
Power Loss (Outage or Brownout)
All set points and advanced settings are restored after any power
loss or interruption.
NOTE: All settings are stored in non-volatile flash memory.
Status
Use the Status menu (see Table 17) to check the parameter values
for the various devices and sensors configured.
NOTE: For information about menu navigation and use of the
keypad, see Interface Overview on page 40.
Checkout Tests
Use the Checkout menu (see page 45) to test the damper operation
and any configured outputs. Only items that are configured are
shown in the Checkout menu.
NOTE: For information about menu navigation and use of the
keypad, see Interface Overview on page 40.
To perform a Checkout test:
1.
Scroll to the desired test in the Checkout menu using the ▲
and ▼ buttons.
2.
Press the
(Enter) button to select the item. RUN?
appears.
3.
Press the
(Enter) button to start the test. The unit pauses
and then displays IN PROGRESS. When the test is complete,
DONE appears.
4.
When all desired parameters have been tested, press the
(Menu Up) button to end the test.
The Checkout tests can all be performed at the time of installation
or at any time during the operation of the system as a test that the
system is operable.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage.
Be sure to allow enough time for compressor start-up and shut-
down between checkout tests so that you do not short-cycle the
compressors.
TROBLESHOOTING
Alarms
The economizer module provides alarm messages that display on
the 2-line LCD.
NOTE: Upon power up, the module waits 60 minutes before
checking for alarms. This allows time for all the configured
devices (e.g. sensors, actuator) to become operational. The ex-
ception is the SAT sensor which will alarm immediately.
If one or more alarms are present and there has been no keypad ac-
tivity for at least 5 minutes, the Alarms menu displays and cycles
through the active alarms.
You can also navigate to the Alarms menu at any time.
Clearing Alarms
Once the alarm has been identified and the cause has been re-
moved (e.g. replaced faulty sensor) the alarm can be cleared from
the display.
To clear an alarm, perform the following:
1.
Navigate to the desired alarm.
2.
Press the
(Enter) button. ERASE? displays.
3.
Press the
(Enter) button. ALARM ERASED displays.
4.
Press the
(Menu up/Exit) button to complete the action
and return to the previous menu.
NOTE: If the alarm still exists after clearing it, it is redisplayed
within 5 seconds.
PRE-START-UP/START-UP
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal
injury or death.
1. Follow recognized safety practices and wear approved
Personal Protective Equipment (PPE), including safety
glasses and gloves when checking or servicing refrig-
erant system.
2. Do not use a torch to remove any component. System
contains oil and refrigerant under pressure. To remove
a component, wear PPE and proceed as follows:
a. Shut off all electrical power to unit. Apply appli-
cable lockout/tag-out procedures.
b. Recover refrigerant to relieve all pressure from
system using both high-pressure and low pressure
ports.
c. Do not use a torch. Cut component connection
tubing with tubing cutter and remove component
from unit.
d. Carefully un-sweat remaining tubing stubs when
necessary. Oil can ignite when exposed to torch
flame.
3. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is in
place and secured.
4. Do not remove compressor terminal cover until all
electrical power is disconnected and approved lock-
out/tag-out procedures are in place.
5.
Relieve all pressure from system before touching or dis-
turbing anything inside terminal box whenever refriger-
ant leak is suspected around compressor terminals.
6. Never attempt to repair a soldered connection while
refrigerant system is under pressure.
49
WARNING
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Table of Contents
Troubleshooting
