Download McQuay M5MAC Troubleshooting guide

McQuay Service Guide Book
L2 Models
Two selections are available:
a. Fan ON:
- If the indoor coil temperature > 40°C, the indoor fan will run at speed.
- If the indoor coil temperature crosses 37°C, the indoor fan willrun at low speed.
- if the indoor coil temperature <18°C, the indoor fan will stop.
b. Fan OFF
- If the indoor coil temperature >40°C, the indoor fan will run at set speed.
- If the indoor coil temperature crosses 37°C, the indoor fan willrun at low speed.
- If indoor coil temperature <30°C, the indoor fan will stop.
L208A / LWS2.0 models
There are 2 tables setting for HT_KP & MODEL jumpers as shown as below.
For L208A jumper setting
Pin 1&2
Pin 2&3
Open
MODEL
HT_KP
MS
INTVL
ALWY ON
ON
OFF
-
For LWS2.0 jumper setting
Pin 1&2
Pin 2&3
Open
MODEL
Single
Tandem
DX
HT_KP
ON
OFF
INTVL
HT_KP & MODEL Jumpers
Software
Type
Tandem WSHP
LWS2.0
Single WSHP
DX
L208A
DX
Hotkeep Selection
Jumper
Fan On
Fan Off
Interval
Always On
MODEL
Pin 2 & 3
Pin 2 & 3
Pin 2 & 3
X
Multisplit
X
HT_KP
Pin 1 & 2
Pin 2 & 3
Open
X
X
MODEL
Pin 1 & 2
Pin 1 & 2
Pin 1 & 2
X
X
HT_KP
Pin 1 & 2
Pin 2 & 3
Open
X
X
MODEL
Open
Open
Open
X
X
HT_KP
Pin 1 & 2
Pin 2 & 3
Open
X
X
MODEL
Open
Open
Pin 2 & 3
Open
Pin 1 & 2
HT_KP
Pin 1 & 2
Pin 2 & 3
Open
Open
Open
The above table is the summary of the jumpers setting for both LWS2.0 and L208A.
For example,
WSHP single compressor with Fan ON for hot keep selection:
Place the shunt jumpers on HT_KP (Pin 1 & 2) & MODEL (Pin 1& 2).
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