Controller Setting; Auto Random Restart; Hot Keep Selection - McQuay MWM Service Manual

MCQUAY Service Guide Book

5.0 CONTROLLER SETTING

5.1 Auto Random Restart

•
Shorted at JH/JP1/J_LST jumper at main
board for auto restart (supplied).
•
Remove the jumper to have non-auto restart.
D2.0
U1.5 / SQ2.0
L2.2 / L208A / LWS / W2 / J2*
* Available on J2 PCB version T4 and above

5.2 Hot Keep Selection

Three selections available:
a. Fan stop if indoor coil temperature < 30°C
(OFF).
b. Fan runs at low speed if indoor coil
temperature < 30°C and stop if indoor coil
temperature < 18°C (ON).
c. Cycle of low fan running for 30s and fan
off for 120s and repeat (INTERVAL).
WM – F/FR (U1.5 & L2EF)
3 selections available at the slide switch on the
On/Off Switch Board; Preset at OFF.
Other models (U1.5)
At CN3 location on the PCB,
i. Remove the connector to have (b) Fan
ON and
ii. Cut off the big resistor (12kOhm) to have
(c) Fan INTERVAL
Non-ducted Model – standard setting is (a) Fan
OFF
Ducted Model – standard setting is (c) Fan
INTERVAL
26
Controller Configuration